Sports Betting Glossary: Every Term You Need to Know

Accumulator

An accumulator is a bet that combines multiple selections into a single wager, where all selections must win for the bet to pay out. Also called a parlay in American terminology or a multi in Australian markets. The odds of each selection multiply together, creating potentially large payouts but with significantly higher risk. A four-leg accumulator at average odds of 2.00 per leg pays 16.00 combined, but the probability of winning all four is just 6.25% at true odds. Use our parlay calculator to compute accumulator payouts across different odds formats.

Action

Action means a bet is live and accepted by the sportsbook, and it will be graded based on the result. A bettor who has "action" on a game has money riding on the outcome. The term can also refer to the total volume of bets placed on an event. "There was heavy action on the Lakers" means significant money was wagered on that side.

Against the Spread (ATS)

Against the spread is a record of how a team performs relative to the point spread, rather than simply winning or losing outright. A team that is 8-4 ATS has covered the spread in 8 of their 12 games, regardless of their straight-up win-loss record. ATS records are a critical tool for evaluating teams from a betting perspective, since a team can have a strong win-loss record but a poor ATS record if they frequently fail to cover as favorites.

American Odds

American odds are the standard odds format used in the United States and at US-facing sportsbooks. Favorites are represented with a minus sign (e.g., -150), indicating the amount you must risk to win $100. Underdogs carry a plus sign (e.g., +200), indicating the profit you earn on a $100 stake. American odds are the default format at books like Bovada and BetAnything. See our complete guide to reading betting odds for conversion formulas.

Ante Post

Ante post betting refers to placing wagers on an event well in advance, often weeks or months before it takes place. The term originates from horse racing but applies to any futures market. Ante post bets typically offer higher odds because of the additional uncertainty, but most ante post bets are non-refundable if your selection withdraws before the event.

Arbitrage

Arbitrage is the practice of placing bets on all possible outcomes of an event across different sportsbooks, locking in a guaranteed profit regardless of the result. Arbitrage opportunities arise when odds discrepancies between books create a situation where the combined implied probabilities total less than 100%. For example, if one book offers Team A at +150 and another offers Team B at +150 in a two-way market, betting both sides guarantees a profit. Sharp books like Pinnacle set tight margins that make arb opportunities rare, but they can appear between recreational books. Most sportsbooks actively monitor for arbitrage activity and may limit accounts.

Asian Handicap

An Asian handicap is a form of handicap betting that originated in Asia and eliminates the possibility of a draw by using half-goal and quarter-goal handicaps. A team given a -0.75 Asian handicap must win by 2 or more goals for a full win, wins by exactly 1 goal for a half win (half the stake returned), and results in a loss on any other outcome. Asian handicaps are hugely popular in soccer betting and are offered extensively on bet365 and Pinnacle.

---

Bad Beat

A bad beat is a bet that appears certain to win but loses due to a late or improbable event, such as a last-second touchdown, an injury-time goal, or a garbage-time cover. Bad beats are an inevitable part of sports betting and a key reason why disciplined bankroll management is essential.

Bankroll

Your bankroll is the total amount of money you have set aside exclusively for wagering. A properly managed bankroll is separate from personal finances and is sized to withstand extended losing streaks. Most professionals recommend starting with a bankroll large enough to sustain at least 50 to 100 units of your standard bet size. See our dedicated bankroll management guide for strategies and calculations.

Bet Slip

A bet slip is the digital or physical ticket that records the details of your wager, including the selection, odds, stake, and potential payout. On online sportsbooks, the bet slip is the interface where you review and confirm your bets before submission. Most modern books like BetAnything allow you to build multi-leg parlays directly in the bet slip.

Betting Exchange

A betting exchange is a platform where bettors wager against each other rather than against a sportsbook. The exchange charges a commission on winning bets, typically 2% to 5%. Betfair is the most prominent example. Exchanges allow you to both back (bet for) and lay (bet against) outcomes, and they generally offer better odds than traditional sportsbooks because there is no built-in bookmaker margin.

Betting Margin

The betting margin (also called the overround or vig) is the sportsbook's built-in edge on every market. It is the percentage by which the sum of all implied probabilities exceeds 100%. A market with implied probabilities totaling 104% has a 4% margin. Lower margins mean better value for bettors. Pinnacle is known for offering some of the lowest margins in the industry, often below 2.5% on major markets. Read more in our article on how betting margins work.

BTTS (Both Teams to Score)

BTTS is a popular soccer betting market where you wager on whether both teams will score at least one goal during the match. The bet is settled based on goals scored in regular time only (90 minutes plus stoppage time). BTTS markets are widely available at bet365 and other international sportsbooks, and they have become one of the most popular soccer bet types worldwide.

Book / Bookmaker

A bookmaker (or simply a "book") is a person or company that accepts bets on sporting events and sets the odds. Also called a sportsbook or bookie. The bookmaker's profit comes from the vig built into the odds. You can browse our sportsbook reviews to compare the major international bookmakers including Bovada, bet365, Pinnacle, and BetAnything.

Buy Points

Buying points means paying for a more favorable point spread or total by accepting worse odds. For example, moving a spread from -3 to -2.5 in exchange for paying -125 instead of -110. Buying through key numbers like 3 and 7 in football carries a higher price because those margins of victory occur more frequently.

Beard

A beard is a person who places bets on behalf of another bettor, typically to disguise the identity of a sharp who has been limited by a sportsbook. Using a beard allows restricted bettors to continue placing wagers at books that have reduced their limits.

---

Cash Out

Cash out is a feature offered by many sportsbooks that allows bettors to settle a bet before the event concludes, locking in a profit or minimizing a loss based on the current odds. The cash-out value is calculated by the sportsbook and typically includes a margin, meaning you receive slightly less than the mathematically fair value. bet365 and Bovada both offer robust cash-out functionality across most markets.

Chalk

Chalk is slang for the favorite in a betting market. A "chalk player" or "chalk bettor" is someone who predominantly bets on favorites. The term comes from the days when odds were written on chalkboards and the favorites were bet so heavily that their numbers were constantly erased and rewritten.

Closing Line

The closing line is the final odds offered on a market at the time the event begins. The closing line is considered the most efficient price because it incorporates all available information and betting action from both recreational and sharp bettors. Consistently beating the closing line is the strongest predictor of long-term profitability in sports betting. Pinnacle's closing lines are widely regarded as the most efficient in the industry.

Closing Line Value (CLV)

Closing line value is the difference between the odds at which you placed your bet and the closing line. Positive CLV means you got a better price than the final market price, indicating sharp betting acumen. For example, if you bet a team at +150 and the line closes at +130, you captured positive CLV. Professional bettors track CLV as the primary metric of their edge.

Combination Bet

A combination bet (also called a combo bet or system bet) is a wager that generates multiple smaller bets from a larger group of selections. Unlike a straight accumulator where every leg must win, combination bets include different parlay groupings so you can still profit if one or more selections lose. Round robins, Yankees, and full cover bets are all types of combination bets.

Correct Score

Correct score is a betting market where you predict the exact final score of a match. Because there are dozens of possible outcomes, correct score odds tend to be very high, often ranging from 6.00 to 100.00 or more. This market is most popular in soccer betting at sportsbooks like bet365.

Consensus

The consensus is the percentage of bets or money wagered on each side of a market, as reported by tracking services. Consensus data shows where the public is betting versus where the sharp money is going. When the majority of tickets are on one side but the line moves the other way, it signals sharp action on the less popular side.

Cover

To cover means to win against the point spread. A team that is favored by 7 points and wins by 10 has "covered" the spread. A team favored by 7 that wins by exactly 7 results in a push, not a cover. Conversely, an underdog that loses by fewer points than the spread has also covered.

---

Dead Heat

A dead heat occurs when two or more participants tie for a position that affects bet settlement. Dead heat rules typically divide the payout proportionally among the tied participants. For example, if two golfers tie for first place, your outright winner bet would be settled at half the original odds. Dead heats are most common in horse racing, golf, and any sport where multiple finishers can share a placing.

Decimal Odds

Decimal odds are the standard odds format used in Europe, Australia, and most international markets. The number represents the total return per unit staked, including your original stake. Odds of 2.50 mean a $10 bet returns $25 ($15 profit plus your $10 stake). Decimal odds are the default at international sportsbooks including bet365 and Pinnacle. For conversion formulas, see our guide on understanding odds formats or use our odds converter.

Dog (Underdog)

The dog is the team or participant expected to lose, as reflected by higher odds. The underdog receives a plus sign in American odds (e.g., +200) or is listed at odds greater than 2.00 in decimal format. Underdogs win more often than casual bettors assume, which is why sharp bettors frequently find value on the dog side.

Double

A double is an accumulator consisting of exactly two selections. Both selections must win for the bet to pay out. Doubles are the simplest form of multi-bet and carry lower risk than trebles or larger accumulators.

Double Chance

Double chance is a soccer betting market that allows you to cover two of the three possible outcomes in a single bet: home win or draw, away win or draw, or home win or away win. Double chance bets offer lower odds than a straight 1X2 bet because you are covering more outcomes, but they reduce the risk of losing.

Double Result

A double result bet (also called half time/full time) requires you to predict the result at both half time and full time. For example, betting "Home/Away" means you are predicting the home team leads at half time but the away team wins the match. There are nine possible outcomes, and the odds are correspondingly high because both predictions must be correct.

Draw No Bet

Draw no bet (DNB) is a market that eliminates the draw as a possible outcome. If the match ends in a draw, your stake is returned. This is effectively a two-way moneyline on a sport that normally has three outcomes, such as soccer. DNB is a popular safety net for bettors who want to back a team to win without the risk of losing to a draw.

Drifting

When odds are drifting, they are increasing over time, indicating that less money is being wagered on that outcome or that the sportsbook considers it less likely. "The price drifted from 2.50 to 3.20" means the outcome became less favored by the market. The opposite of drifting is shortening or steaming.

---

Each Way

An each way bet is common in horse racing and golf, consisting of two parts: a bet on the selection to win and a bet on the selection to place (finish in the top positions, usually top 3-5 depending on the event). If the selection wins, both parts pay out. If it places but does not win, only the place portion pays at a fraction (typically 1/4 or 1/5) of the win odds.

Edge

An edge is the theoretical advantage a bettor has over the sportsbook on a given wager, expressed as a percentage. If you estimate a 55% probability on a bet that the implied probability prices at 50%, your edge is approximately 5%. Consistent edges, compounded over many bets, are how professionals generate profit. Finding and exploiting edges consistently is the foundation of professional sports betting.

Even Money

Even money (also called "evens") represents odds that pay back exactly the amount staked as profit. Represented as +100 in American odds, 2.00 in decimal, or 1/1 in fractional format. An even money bet implies a 50% probability before the vig is considered. In practice, true even money lines are rare because sportsbooks build vig into both sides.

Exotic Bet

An exotic bet is any wager beyond the standard moneyline, spread, and total markets. Includes props, futures, teasers, round robins, correct score, and other specialized wager types. Exotic markets tend to carry higher overrounds, meaning the sportsbook takes a larger margin.

Expected Value (EV)

Expected value is the average profit or loss per bet over the long run, calculated by weighting each possible outcome by its probability. Positive expected value (+EV) indicates a profitable bet over time. The formula is: EV = (Probability of Winning x Profit) - (Probability of Losing x Stake). All successful long-term betting strategies are built on identifying +EV opportunities. See our odds guide for worked EV calculations.

Exposure

Exposure is the total amount of money a sportsbook or bettor stands to lose on a particular event or across all active bets. Sportsbooks manage exposure by adjusting odds and limits to balance the money on each side of a market. Bettors should track their own exposure to avoid having too much of their bankroll tied up in unsettled wagers.

---

Favorite

The favorite is the team, player, or outcome expected to win, as reflected by lower odds. Denoted by a minus sign in American odds (e.g., -150) or listed below 2.00 in decimal format. Favorites win more often than underdogs, but they do not always cover the spread or provide positive expected value.

First Goalscorer

The first goalscorer market asks you to predict which player will score the first goal in a match. This is a high-variance prop bet popular in soccer and hockey betting. If your selected player does not take the field, most sportsbooks will void the bet. bet365 offers extensive first goalscorer markets across all major soccer leagues.

Fixed Odds

Fixed odds means the odds are locked in at the time the bet is placed and do not change regardless of subsequent market movements. The payout is determined by the odds at placement, not the closing line. Most online sportsbooks operate on a fixed odds basis, as opposed to pari-mutuel or tote systems used in some horse racing jurisdictions.

Fractional Odds

Fractional odds are the traditional odds format used in the United Kingdom and Ireland. Displayed as a fraction like 5/1 ("five to one"), where the first number is the profit and the second is the stake. Odds of 5/1 mean you win $5 for every $1 staked. Odds of 1/4 mean you win $1 for every $4 staked. For help converting between fractional, decimal, and American formats, use our odds converter or read our guide on understanding odds formats.

Futures

Futures are long-term bets on outcomes that will be decided at a later date, such as championship winners, season win totals, MVP awards, or relegation. Futures odds shift throughout the season based on performance and betting action. They offer the potential for high payouts but tie up your bankroll for extended periods and typically carry high overrounds (10% to 30%+). You can compare current odds across books on our odds comparison page.

Full Cover

A full cover bet includes every possible combination of doubles, trebles, and larger accumulators from a given set of selections. For example, a full cover bet on four selections (called a "Yankee" in UK terminology) generates 11 bets: 6 doubles, 4 trebles, and 1 fourfold accumulator. Full cover bets provide multiple chances to profit even if not all selections win.

---

Goliath

A Goliath is a full cover bet consisting of 8 selections, generating 247 individual bets: 28 doubles, 56 trebles, 70 fourfolds, 56 fivefolds, 28 sixfolds, 8 sevenfolds, and 1 eightfold accumulator. Goliath bets require a substantial total stake because you are placing 247 separate bets, but they offer returns even if several selections lose.

Graded

A bet is graded when the sportsbook has officially settled it as a win, loss, push, or void. Grading typically occurs within minutes of an event's conclusion for standard markets and may take longer for props or futures. Until a bet is graded, it remains open and the funds are not returned to your balance.

Grand Salami

The grand salami is a bet on the total combined score of all games played in a particular league on a given day. Most commonly associated with MLB and NHL, the sportsbook sets a number for the aggregate total across all scheduled games, and bettors wager over or under. It is a unique market that gives you action across an entire day's card with a single bet.

---

Half Time/Full Time

A half time/full time bet (also called HT/FT) requires you to correctly predict the result at half time and the final result of the match. There are nine possible outcomes (home/home, home/draw, home/away, draw/home, draw/draw, draw/away, away/home, away/draw, away/away). This market offers high odds because both predictions must be correct.

Handicap

A handicap is a scoring advantage or disadvantage applied to a team to create a more balanced betting market. The term is used broadly in international markets, while American bettors typically refer to "point spreads." In soccer, a team given a -1 handicap starts the match with a one-goal deficit for betting purposes. European and Asian handicap markets are available at bet365 and Pinnacle.

Handle

The handle is the total dollar amount wagered on an event or across all events at a sportsbook. A high handle indicates significant betting volume. The Super Bowl regularly generates a handle exceeding $1 billion across all sportsbooks combined.

Hedge

To hedge means placing a bet on the opposite side of an existing wager to reduce risk or guarantee a profit regardless of the outcome. Hedging is commonly used when a parlay leg or futures bet is close to winning. For example, if you have a futures ticket on a team at 25/1 and they reach the championship game, you might bet the opposing team to lock in a profit no matter who wins.

Hold

The hold is the percentage of the total handle that the sportsbook retains as profit after all bets on an event are settled. Hold varies by sport and bet type but typically ranges from 5% to 25%. Hold is higher than the theoretical vig because of parlays, props, and bettor behavior patterns. Read about the relationship between hold and margin in our article on how betting margins work.

Hook

A hook is a half-point in the point spread. A team favored by "three and a hook" is favored by 3.5 points. The hook eliminates the possibility of a push and can be the difference between a win and a loss, especially around key numbers like 3 and 7 in football.

---

Implied Probability

Implied probability is the probability of an outcome as derived from the betting odds. For American odds, the formula for favorites is: risk / (risk + profit) x 100. For decimal odds, the formula is: 1 / decimal odds x 100. The sum of implied probabilities for all outcomes in a market exceeds 100% due to the vig. Understanding implied probability is the key to identifying value bets. Our odds converter calculates implied probability automatically.

In-Play Betting

In-play betting (also called live betting) is wagering on an event after it has started, with odds adjusting in real time based on the action. In-play markets are offered by most major sportsbooks and have grown to represent a significant share of total handle, sometimes exceeding 50% at European books. bet365 is particularly known for the depth and speed of its live betting markets. For strategies on capitalizing on live markets, see our live betting strategy guide.

---

Juice (Vig)

Juice is the commission charged by the sportsbook on a bet, built into the odds. Also called vig or vigorish. On a standard spread bet at -110/-110, the juice is approximately 4.55%. Lower-juice sportsbooks like Pinnacle offer reduced margins, improving long-term bettor returns. Even small differences in juice compound dramatically over hundreds or thousands of bets.

---

Kelly Criterion

The Kelly Criterion is a mathematical formula for calculating the optimal bet size based on your estimated edge and the odds offered. The formula is: Kelly % = (bp - q) / b, where b is the decimal odds minus 1, p is the probability of winning, and q is the probability of losing (1 - p). Full Kelly is extremely aggressive, so most practitioners use fractional Kelly, typically one-quarter to one-half of the full recommendation. See our bankroll management guide for more on optimal staking strategies.

Key Number

A key number is a common margin of victory in a sport that carries special significance for spread bettors. In NFL football, 3 and 7 are the most important key numbers because field goals and touchdowns are the primary scoring units. Approximately 15% of NFL games are decided by exactly 3 points and 9% by exactly 7 points. Getting the right side of a key number through line shopping can dramatically impact your long-term results.

---

Lay Bet

A lay bet is a bet against an outcome. On a betting exchange, laying a selection means you are betting it will lose. If the selection loses, you win the backer's stake minus the exchange commission. If the selection wins, you pay the backer's winnings. Laying is the role traditionally played by the bookmaker, and it is exclusive to exchanges.

Limit

The limit is the maximum amount a sportsbook will accept on a single bet. Limits vary by sport, league, bet type, and the bettor's profile. Sportsbooks reduce limits for bettors they identify as sharp. Pinnacle is notable for maintaining high limits and not restricting winning players, which is why professional bettors rely on it as a primary outlet.

Line

The line refers to the odds or point spread offered on a market. "The line" on a game encompasses all the available betting options and their associated odds. "What's the line on the game?" is asking for the current spread and odds.

Line Movement

Line movement is a change in the odds or point spread after the opening line is posted. Line movement is driven by betting volume, sharp action, and new information such as injury reports or weather changes. Tracking line movement across multiple sportsbooks helps bettors identify where the sharp money is going. Compare current lines on our odds page.

Lock

A lock is a bet that is perceived as certain to win. In reality, there are no true locks in sports betting. Treating any bet as a guaranteed winner leads to dangerous over-sizing and emotional decision-making. Anyone who tells you a bet is a "lock" should be approached with extreme skepticism.

Long Shot

A long shot is an outcome with a very low implied probability and correspondingly high odds. A 50-to-1 long shot in a futures market is expected to win approximately 2% of the time. While long shots offer large payouts, they must be assessed on expected value just like any other bet and sized conservatively relative to your bankroll.

---

Margin

The margin (also called overround or vig) is the sportsbook's built-in profit on a market, expressed as the percentage by which the sum of implied probabilities exceeds 100%. A two-way market with implied probabilities of 52.4% and 52.4% has a margin of 4.8%. Lower-margin books give bettors better value. Pinnacle consistently offers the lowest margins in the industry. See our detailed breakdown of how betting margins work.

Middle

A middle is a situation in which a bettor has bets on both sides of a market at different point spreads, creating a window in which both bets can win. If you bet Team A at -2.5 and later bet Team B at +4.5 (at a different book or after a line move), any result where Team A wins by exactly 3 or 4 points results in both bets winning. Middles are rare but highly profitable when they hit.

Moneyline

A moneyline bet is a wager on which team or player will win the event outright, with no point spread involved. The odds reflect the relative probability of each side winning. Moneyline bets are the simplest form of sports wagering and the default market in sports like baseball, hockey, soccer, and combat sports. Moneyline odds are available on virtually every sporting event at sportsbooks like Bovada and BetAnything.

Multiple

A multiple is any bet that combines two or more selections into a single wager. Doubles, trebles, accumulators, and system bets are all types of multiples. The term is more commonly used in European and international markets, where American bettors would say "parlay."

MVP Odds

MVP odds are futures odds on which player will win a league's Most Valuable Player award. MVP markets are available for major leagues such as the NFL, NBA, MLB, and major European soccer leagues. These are long-term bets that are typically graded at the end of the regular season or award ceremony.

Mush

A mush (also called a cooler) is slang for a bettor who is perceived to bring bad luck. If a mush backs your team, superstition says that team will lose. This is entirely superstitious and has no basis in probability or mathematics.

---

Nickel

A nickel is slang for a $500 bet. A "dime" is $1,000. These terms are holdovers from the era of phone betting with illegal bookmakers, where coded language was used for discretion.

No Action

No action means a bet is canceled and the stake returned. This typically happens because the event was postponed, a key condition was not met (such as a starting pitcher change in baseball), or a player did not participate in a prop bet. No action bets are graded as void. In parlay bets, a no-action leg is typically removed and the parlay recalculated at the reduced number of legs.

---

Odds

Odds are the numerical expression of the probability of an outcome and the payout a bettor receives for a correct prediction. Odds are presented in American (+150, -200), decimal (2.50, 1.50), or fractional (3/2, 1/2) format depending on the sportsbook and market convention. For a thorough explanation, read our guide on how to read betting odds or convert between formats with our odds converter.

Odds Compiler

An odds compiler is the person or team responsible for setting the odds at a sportsbook. Also called a trader or linemaker. The odds compiler balances statistical models, market intelligence, and liability management to set efficient prices. At sharp sportsbooks like Pinnacle, odds are driven heavily by mathematical models, while recreational books may shade lines toward public perception.

Odds-On

Odds-on describes a selection that is priced below even money, meaning the bettor must risk more than they stand to win. In decimal odds, anything below 2.00 is odds-on. In American odds, any minus figure (e.g., -150) is odds-on. In fractional odds, anything below 1/1 (e.g., 4/7) is odds-on.

Off the Board

An event that is off the board has been temporarily removed from betting, usually due to a significant injury, weather concern, or other uncertainty. The sportsbook will re-post the event once the situation is resolved. You cannot place bets on an event that is off the board.

Opening Line

The opening line is the first set of odds or point spread posted by a sportsbook for a given event. Opening lines are typically released early in the week for major sports. The difference between the opening line and the closing line tells you how the market moved and which side attracted the most sharp action.

Outright

An outright bet is a wager on the overall winner of a tournament, league, or competition, rather than an individual match. Also called a futures bet when placed well in advance. For example, betting on Manchester City to win the Premier League before the season starts is an outright bet.

Over/Under (Totals)

The over/under (also called the total) is a bet on whether the combined score of both teams will be above (over) or below (under) a number set by the sportsbook. For example, if the total on an NBA game is set at 215.5, you bet whether the final combined score will be 216 or more (over) or 215 or fewer (under). One of the three core bet types alongside moneylines and point spreads. Compare totals across sportsbooks on our odds page.

Overround

The overround is the total implied probability of all outcomes in a market, which exceeds 100%. The amount by which it exceeds 100% represents the sportsbook's margin. A market with 104% overround has a 4% margin. Pinnacle consistently offers the lowest overrounds in the industry, typically 1.5% to 2.5% on major markets. See also our article on how betting margins work.

---

Parlay

A parlay is a single bet that combines two or more individual selections. All legs must win for the parlay to pay out. The combined odds are the product of the individual decimal odds of each leg, creating the potential for large returns from a small stake. Also called an accumulator (UK) or multi (Australia). Parlays carry a higher effective vig than straight bets. Use our parlay calculator to determine potential payouts.

Pick'em

A pick'em (abbreviated PK) is a game in which neither team is favored, and the point spread is zero. Both teams are at essentially even odds to win against the spread. The moneyline odds may still differ slightly due to the vig.

Point Spread

The point spread is the number of points by which the favored team is expected to win. The favorite must win by more than the spread for a bet on them to cover, while the underdog can lose by fewer than the spread and still cover. For example, if the spread is -6.5, the favorite must win by 7 or more points. Point spreads are the most popular bet type in NFL and NBA wagering.

Prop Bet

A prop bet (proposition bet) is a wager on a specific aspect of an event rather than the final outcome. Player props include individual statistical performances (e.g., total passing yards, goals scored, strikeouts). Game props include events like first team to score, whether the game goes to overtime, or the method of victory. Prop markets are often less efficient than main lines, creating opportunities for sharp bettors with specialized knowledge.

Public Money

Public money refers to bets placed by recreational or casual bettors, who tend to favor favorites, overs, and high-profile teams. Public money is contrasted with sharp money. When heavy public money is on one side, sportsbooks may shade the odds accordingly, sometimes creating value on the less popular side.

Puck Line

The puck line is the point spread in hockey, typically set at 1.5 goals. The favorite is -1.5 (must win by 2 or more goals) and the underdog is +1.5 (can lose by 1 goal and still cover). The puck line is hockey's equivalent of the run line in baseball.

Push

A push occurs when a bet results in a tie against the spread or total, with the bettor's stake returned in full. Pushes happen on whole-number spreads and totals when the result lands exactly on the number. For example, if the spread is -3 and the favorite wins by exactly 3 points, the bet is a push. In a parlay, a push typically removes that leg and recalculates the payout.

---

Reduced Juice

Reduced juice (also called reduced vig) refers to sportsbooks that offer lower margins than the standard -110/-110 pricing. Some books price standard markets at -105/-105 or even -102/-102. Pinnacle is the industry leader in reduced juice, offering margins that are typically 2-4 percentage points lower than recreational books. Over time, reduced juice dramatically improves your return on investment.

Return on Investment (ROI)

Return on investment is the percentage of profit relative to total money wagered. An ROI of 5% means you have earned $5 in profit for every $100 wagered. ROI is the most meaningful long-term measure of betting performance. Professional bettors typically target 2% to 5% ROI across large sample sizes. Track your ROI consistently using unit-based records.

Reverse Line Movement

Reverse line movement is a situation in which the point spread moves in the opposite direction from the majority of public bets. For example, if 75% of bets are on Team A but the line moves in favor of Team B, this typically indicates that sharp money on Team B is outweighing the public volume on Team A. Reverse line movement is one of the most reliable indicators of sharp action.

Round Robin

A round robin is a series of smaller parlays generated from a larger group of selections. A round robin of four teams creates multiple two-team and three-team parlay combinations, providing partial coverage if not all legs win. For example, a three-team round robin generates three two-team parlays. Round robins cost more than a single accumulator but reduce the all-or-nothing risk.

Run Line

The run line is the point spread in baseball, typically set at 1.5 runs. The favorite is -1.5 (must win by 2 or more runs) and the underdog is +1.5 (can lose by 1 run and still cover). Alternate run lines at -2.5, +2.5, and other values are also commonly offered.

---

Sharp

A sharp is a professional or highly skilled bettor whose wagers are respected by sportsbooks. Sharp bettors are knowledgeable, disciplined, and consistently profitable. Sportsbooks monitor sharp action closely and often adjust lines based on sharp bets. Being identified as sharp can lead to bet limits being reduced at recreational books. Pinnacle is the rare book that welcomes sharp action without restricting accounts.

Spread

See Point Spread. The spread is shorthand for the point spread, the margin by which a team must win or lose for a bet to be graded as a win.

Square

A square is a casual or recreational bettor. The opposite of a sharp. Square bettors tend to bet popular sides, inflate parlays, and chase losses. The term is not necessarily pejorative, as most bettors are squares and sportsbooks' primary revenue comes from square action.

Staking Plan

A staking plan is a systematic method for determining how much to bet on each wager. Common staking plans include flat betting (fixed unit size), percentage-of-bankroll betting, and the Kelly Criterion. A sound staking plan is essential for long-term survival in sports betting. For detailed strategies, read our bankroll management guide.

Steam Move

A steam move is a sudden, dramatic line movement across multiple sportsbooks simultaneously, typically triggered by large bets from sharp bettors or syndicates. Steam moves indicate strong conviction from informed bettors. Once a steam move begins, the value disappears quickly as all books adjust their lines within minutes.

Straight Bet

A straight bet is a single bet on one outcome, as opposed to a parlay or other combination wager. Straight bets are the foundation of disciplined bankroll management and carry lower effective vig than parlays or exotic bets. Most professional bettors rely primarily on straight bets.

Sucker Bet

A sucker bet is a wager with a high built-in margin that heavily favors the sportsbook. These bets appeal to recreational bettors with the promise of large payouts but carry terrible expected value. Multi-leg same-game parlays promoted heavily by sportsbooks often fall into this category, as the margins on these products can exceed 20%.

System Bet

A system bet is a type of combination bet that generates multiple parlays from a set of selections, allowing you to profit even if not all selections win. Unlike a straight accumulator, where one loss means the entire bet loses, system bets include every possible parlay combination of a specified size. A "system 2/4" bet, for example, generates all possible two-leg parlays from four selections (six total bets).

---

Teaser

A teaser is a parlay in which the bettor can adjust the point spread or total on each leg by a specified number of points, in exchange for reduced odds. A six-point teaser in football moves each spread by 6 points in the bettor's favor. Teasers are most effective when they cross key numbers like 3 and 7 in NFL games. All legs must still win for the teaser to pay out.

Tipster

A tipster is a person who sells or shares betting picks and predictions. The quality of tipsters varies enormously. Legitimate tipsters maintain transparent, verified track records with audited results over large sample sizes. The vast majority of paid tipster services do not outperform random selection over the long term. Always demand verifiable records before following any tipster's advice.

Total

The total is the combined score of both teams in a game. Bettors wager on whether the total will be over or under the sportsbook's number. Also called the over/under. Totals are one of the three core bet types alongside moneylines and point spreads. Compare totals across sportsbooks on our odds page.

Treble

A treble is an accumulator consisting of exactly three selections. All three must win for the bet to pay out. Trebles are popular in soccer betting, where bettors combine three match results into a single wager for enhanced odds.

True Odds

True odds represent the actual probability of an outcome without any sportsbook margin built in. If the true probability of a coin flip is 50%, the true odds are 2.00 (decimal) or +100 (American). Sportsbook odds are always slightly worse than true odds because of the vig. The gap between the sportsbook's odds and the true odds is the margin. See our article on understanding odds formats for more.

---

Under

The under is a bet that the combined score of both teams will fall below the total set by the sportsbook. If the total is 42.5 and the final combined score is 38, the under wins. The under is one half of the over/under market.

Underdog

The underdog is the team, player, or outcome expected to lose. Underdogs carry positive American odds (e.g., +180) or decimal odds above 2.00, reflecting a lower implied probability of winning. Despite being expected to lose, underdogs frequently offer better value than favorites because the public tends to undervalue them.

Unit

A unit is a standardized measure of bet size relative to a bettor's bankroll. One unit is typically 1% to 3% of total bankroll. Using units rather than dollar amounts allows for consistent tracking and comparison across different bankroll sizes and over time as your bankroll grows or shrinks. For example, being "up 15 units" has meaning regardless of whether your bankroll is $1,000 or $100,000. See our bankroll management guide for more on unit sizing.

---

Value Bet

A value bet is a wager in which the odds offered by the sportsbook are higher than the bettor's estimated true probability of the outcome. For example, if you assess a team's chances at 55% but the odds imply only 45%, the bet has significant value. Value betting is the core principle of profitable sports wagering. A value bet exists whenever the implied probability is lower than your assessed probability, regardless of whether the team is a favorite or underdog.

Vigorish (Vig)

Vigorish (commonly shortened to vig) is the commission charged by the sportsbook on every bet, embedded in the odds. Also called juice. The standard vig on a -110/-110 line is approximately 4.55%. Lower-vig sportsbooks like Pinnacle provide better long-term returns for bettors. Even a 1% difference in vig can translate to thousands of dollars over a season of betting. The word "vigorish" comes from the Yiddish word for "winnings." For a deeper understanding, read our article on how betting margins work.

---

Wager

A wager is a bet. It is any amount of money risked on the outcome of a sporting event. The terms "wager" and "bet" are completely interchangeable throughout the betting industry.

Wire-to-Wire

A wire-to-wire win occurs when a team or participant leads from start to finish without ever trailing. In betting, this concept is relevant to half time/full time bets and in-play markets. A team that wins wire-to-wire often covers large spreads and fires the over on team totals.

Wiseguy

A wiseguy is a sharp or professional bettor. Sportsbooks track wiseguy activity to gauge market sentiment and adjust lines accordingly. The term originated in Las Vegas sports betting culture and carries respect for the bettor's skill and knowledge.

---