The Complete Sports Betting Glossary
A practical guide to the sports-betting terms you are most likely to encounter, from action and implied probability to sportsbook margin, responsible-gaming controls, and win totals. Jump to a letter or scroll through the full list.
A
ActionHaving any money down on a game or event.
Alternative LineA different version of the main spread or total, priced with adjusted odds based on how likely the sportsbook thinks it is.
ArbitragePlacing bets on different sides or markets at different prices in an attempt to lock in a return regardless of the outcome. Opportunities are uncommon and can disappear quickly as prices move.
ATS (Against the Spread)A team's record measured against the point spread, rather than by outright wins and losses.
B
Backdoor CoverWhen a trailing team scores late, seemingly meaningless points that end up covering the spread.
Bad BeatLosing a bet that looked all but won until a late turn of events.
BankrollThe amount of money someone has set aside specifically for betting. A responsible betting budget should only use disposable income that can be lost without affecting essential expenses.
Bet SlipThe screen or ticket that lists the selections, odds, stake, and potential payout before a wager is submitted.
Book / SportsbookA regulated operator or platform that posts betting markets, accepts wagers, and settles results.
Buy PointsPaying a less favorable price in exchange for moving a spread or total in the bettor's favor.
C
CashoutA feature that lets a bettor settle a wager early, before the event ends, for a partial payout.
ChalkSlang for the favorite. A "chalk bettor" tends to back favorites.
Closing LineThe final odds available right before an event begins.
Closing Line Value (CLV)A comparison between the price a bettor took and the market's final closing price. Getting a better price than the close is often described as beating the closing line.
Cooling-Off Period / Time-OutA temporary, self-imposed break that restricts access to betting for a chosen period of time.
CoverWhether a side wins its point-spread bet. A favorite covers by winning by more than the spread; an underdog covers by winning outright or losing by less than the spread.
D
Deposit LimitA responsible-gaming control that caps how much money can be added to a betting account over a set period.
E
EdgeA perceived advantage a bettor believes they have over the sportsbook's line.
Even MoneyA price that pays one unit of profit for every one unit risked, commonly shown as +100 in American odds or 2.00 in decimal odds.
Expected Value (EV)A mathematical estimate of the average amount a wager would win or lose if the same situation could be repeated many times. Positive EV does not guarantee any individual bet will win.
F
FadeBetting against a team, player, or popular pick.
FavoriteThe team or player expected to win. Favorites commonly carry a minus sign in American odds.
Futures BetA long-term wager on a season-long or tournament outcome, such as a championship winner, placed well before the result is decided.
G
GradeThe process of marking a ticket as a win, loss, push, or void once an event or market is settled.
H
HandicapperSomeone who studies matchups to try to estimate likely outcomes or identify betting prices they consider favorable.
HandleThe total amount of money wagered on an event, market, or across a sportsbook.
High RollerA bettor who wagers unusually large amounts.
Hit RateHow often a specific bet type, player prop, or set of picks has won over a defined sample.
HoldThe percentage of total handle a sportsbook keeps as revenue after paying winning wagers. It is related to, but not exactly the same as, the vig built into individual prices.
HookA half-point added to a spread or total. A 7.5-point favorite may be described as "laying seven and a hook."
I
Implied ProbabilityThe win probability represented by a betting price. Sportsbook prices usually include margin, so the implied probabilities on all sides of a market can add up to more than 100%.
L
Laying PointsBetting on the favorite in a point-spread market, meaning the team must overcome the listed handicap.
LimitThe maximum amount a sportsbook will accept on a particular wager or market.
Line MovementAny change to a spread, total, or betting price before or during an event.
Live BettingPlacing bets on a game while it is already in progress, with markets and prices updating as the event unfolds.
LockSlang for a bet someone is highly confident will win. No wager is actually guaranteed.
Loss LimitA responsible-gaming control that restricts further betting after net losses reach a user-selected threshold.
M
MiddleHolding bets on opposite sides of a market at different numbers, creating a range where both bets could potentially win.
MoneylineA straight-up bet on who wins, with no point spread involved.
MushSlang for a bettor believed to bring bad luck.
N
No ActionA wager that is canceled under the sportsbook's rules, with the stake returned rather than graded as a win or loss.
O
Odds BoostA promotion that temporarily improves the payout price on an eligible wager, often subject to limits or conditions.
OddsmakerA person, team, or pricing operation responsible for creating or adjusting sportsbook lines and odds.
Odds-On FavoriteA favorite priced below even money, meaning the potential profit is smaller than the amount risked.
Off the BoardWhen a sportsbook temporarily or permanently stops taking bets on a game or market.
Over/Under (Total)A bet on whether a combined statistic, often total points or runs, finishes above or below a posted number.
OverroundThe amount by which the implied probabilities of all outcomes in a market exceed 100%. It is one way to describe the sportsbook's built-in pricing margin.
P
ParlayA single wager combining multiple selections, where every required leg must win for the parlay to pay out unless the rules specify otherwise.
Pick 'EmA matchup with no meaningful favorite or underdog in the spread market, commonly listed at or near zero.
Point SpreadA handicap applied to the final score so a wager is judged against a margin rather than only the outright winner.
Prop BetA wager on a specific event or statistic rather than only the final game result, such as player yards, rebounds, or strikeouts.
Puck LineHockey's common goal-spread market, frequently set at 1.5 goals.
PushWhen a result lands exactly on the betting number and, under standard rules, the wager is refunded.
R
Reality CheckA responsible-gaming feature that interrupts play with information such as session duration or activity, creating a deliberate moment to decide whether to continue.
Round RobinA group of smaller parlays automatically created from a larger set of selections, allowing some combinations to win even if every pick does not.
Run LineBaseball's common run-spread market, frequently set at 1.5 runs.
S
Same-Game ParlayA parlay built from multiple selections tied to the same game or event.
Self-ExclusionA formal responsible-gaming restriction that blocks access to gambling for a selected period and may apply to one operator or multiple licensed operators, depending on the program.
SharpA professional or highly experienced bettor, often associated with larger or more price-sensitive wagering.
SportsbookA company or platform that offers betting markets, posts prices, accepts wagers, and settles outcomes.
SpreadShort for point spread.
StakeThe amount of money risked on a wager. The stake is separate from the potential profit.
SteamA sudden, fast line movement, often caused by concentrated betting activity, new information, or rapid market adjustment.
Straight UpRefers to winning outright, without applying a point spread.
T
TotalAnother name for an over/under market.
U
UnderdogThe team or player considered less likely to win. Underdogs commonly carry a plus price in American moneyline odds.
UnitA standardized way to express bet size or results without using a specific dollar amount.
V
Value BetA wager someone believes is priced more favorably than the true probability of the outcome would justify. A perceived value edge does not guarantee a win.
Vig / JuiceThe sportsbook's built-in pricing charge or margin on a betting market. It is reflected in the difference between a fair price and the price offered to bettors.
VoidA wager that is canceled under the sportsbook's rules, typically with the original stake returned.
W
WagerAnother word for a bet.
Wager LimitA responsible-gaming control that caps how much can be staked on a single wager or over a selected period.
Win TotalA futures market on whether a team finishes above or below a posted number of wins.
Responsible gaming tools to know
Deposit limits, loss limits, cooling-off periods, reality checks, wager limits, and self-exclusion are tools designed to help keep betting within personal time and money boundaries.