Glossary
Betting terminology, decoded. Clear, modern definitions for odds, bet types, value concepts and bonus terms.
Odds & Fundamentals
Action
Any wager placed on a sporting event; it also signals that a bet is live, accepted, and good to be graded.
Against the Spread (ATS)
A team's record judged against the point spread instead of its outright wins and losses.
Bad Beat
A bet that looked like a lock but loses on a last-minute or wildly improbable event.
Cover
When a team beats the point spread by winning by enough margin, it is said to have covered.
Even Money
A bet where your profit matches your stake — decimal 2.00, fractional 1/1, American +100.
Favorite vs Underdog
The favorite is tipped to win (lower odds/shorter price); the underdog is tipped to lose (higher odds/longer price).
Hook
The half-point on a spread (like -3.5 instead of -3) that wipes out any chance of a push.
Implied Probability
The chance of an outcome as signaled by the odds, with the bookmaker's margin baked in.
Juice / Vigorish (Vig)
The bookmaker's commission on every bet, baked right into the odds.
Moneyline
A bet on which team or player wins outright — no point spread in the mix.
No Action
A bet that gets cancelled and the stake refunded — usually from a postponed event, scratched player, or voided conditions.
Odds Formats
The three core ways odds get displayed: Decimal, Fractional, and American (Moneyline).
Off the Board
A game or market the sportsbook has temporarily pulled from betting, usually over uncertainty like injuries or weather.
Over/Under (Totals)
A bet on whether a game's combined score will finish over or under a set number.
Pick'em
A matchup with no favorite — the spread sits at zero, so you're just calling the winner.
Point Spread
A handicap that levels the matchup between the favorite and the underdog.
Push
A bet that ties the spread or total exactly, with your stake returned in full.
Straight Bet
A single pick on one outcome -- moneyline, point spread, or total -- rather than a parlay or combined ticket.
Bet Types
Asian Handicap
A soccer-favorite spread format that removes the draw by applying fractional or whole-number handicaps to one or both teams.
Cash Out
A feature that lets you settle a bet before the event ends, locking in profit or trimming a loss.
Double Chance
A bet covering two of three soccer outcomes (home/draw, away/draw, or home/away), cutting risk for lower odds.
Futures Bet
A wager on an outcome that gets settled down the line, like a season title or tournament champion.
Hedging
Betting the opposite side of a live wager to lock in profit or cap your downside no matter how it ends.
Live Betting (In-Play)
Wagering on an event while it is underway, with odds refreshing in real time.
Parlay (Accumulator)
One ticket that bundles two or more picks into a single bet — every leg has to land for it to pay.
Player Prop vs Game Prop
Player props bet on one athlete's stat line; game props bet on team or match events like who scores first.
Prop Bet (Proposition Bet)
A wager on a specific in-game event or stat that doesn't necessarily tie to the final score or result.
Round Robin
A combo bet that spins a group of picks into multiple parlays, covering every subset of a chosen size.
Run Line / Puck Line
Sport-specific spreads — a fixed 1.5-run line in MLB baseball and a fixed 1.5-goal puck line in NHL hockey.
Same-Game Parlay
A parlay built entirely from selections inside one game or event.
Teaser
A parlay variant that lets you nudge the spread or total in your favor on every leg, trading away some payout for it.
Value & Strategy
Arbitrage Betting
Backing every outcome of an event across different bookmakers so a profit is locked in no matter who wins.
Bankroll
The pool of money you set aside purely for betting, walled off from your everyday finances.
Buying Points
Paying for a friendlier spread or total by taking worse odds, often to cross key numbers like 3 and 7 in football.
Closing Line Value (CLV)
The gap between the odds you bet and the final closing odds, used as a measure of betting skill.
Edge
Your advantage over the book — when the real chance of an outcome beats the chance baked into the price.
Expected Value (EV)
The average profit or loss a bettor can expect per wager over the long run.
Fade the Public (Contrarian Betting)
Betting against the side most casual bettors back, on the theory that public hype creates value on the other side.
Kelly Criterion
A formula that pinpoints the ideal stake by weighing your edge against your bankroll for the fastest sustainable growth.
Key Numbers
The margins that come up most often in a sport, giving certain point spreads outsized weight over others.
Line Shopping
Comparing odds across several books to lock in the best available price on a given bet.
Matched Betting
A method that pairs sportsbook promos like bonus bets and odds boosts with opposing wagers to lock in near-guaranteed profit with minimal risk.
Middling
Betting both sides of a game at different spreads, aiming to win both if the final margin lands inside the gap between the two numbers.
ROI (Return on Investment)
Your profit or loss expressed as a percentage of everything you've wagered.
Steam Move
A sudden, sharp swing in a line driven by heavy action from professional bettors or syndicates.
Tout
Someone who sells betting picks or predictions, frequently backed by inflated claims about their success rate.
Units
A standardized way to size bets against your bankroll, so results and performance compare cleanly regardless of dollar amounts.
Variance (in Betting)
The natural swing in results that shows up even when every bet you place carries positive expected value.
Market Terms
Betting Handle
The total amount wagered on an event or across a sportsbook over a set window of time.
Betting Limits
The smallest and largest amounts a sportsbook will take on a single bet.
Chalk
Slang for the favorite in a matchup; 'betting the chalk' means backing the side expected to win.
Line Movement
A shift in the odds or spread after the opening line drops, driven by betting action, injuries, weather, or fresh information.
Oddsmaker / Bookmaker
The person or company that sets the lines, manages risk, and takes wagers on sporting events.
Opening Line / Closing Line
The opening line is the first odds posted; the closing line is the final odds before the event starts.
Public Betting Percentage
The share of total tickets placed on each side of a market, showing where most recreational bettors have landed.
Reverse Line Movement
When a line drifts opposite to where most public bets sit, flagging sharp money on the quieter side of the market.
Sharp vs Square
Sharps are pros who bet with an edge; squares are recreational bettors who tend to ride public sentiment.
Stale Line
Odds that haven't caught up to fresh information like injuries or lineup changes, opening a value window for alert bettors.
Bonus Terms
Bonus Bet (Free Bet)
A promo bet funded by the sportsbook; win it and you keep the profit but usually not the stake.
Odds Boost
A promo where the sportsbook temporarily lifts the odds on a specific market, handing bettors enhanced potential returns.
Profit Boost
A promo that lifts the profit on a winning bet by a set percentage — not the same as an odds boost.
Qualifying Bet
A bet you must place to unlock a promo, usually subject to minimum odds and stake requirements.
Reload Bonus
A deposit bonus aimed at existing customers on later deposits, rather than a first-time sign-up offer.
Risk-Free Bet
A promo where the book refunds your stake — usually as a bonus bet — if your first wager loses.
Site Credit
Non-withdrawable account funds you can wager, with winnings usually paid out as withdrawable cash.
Wagering Requirements (Rollover)
The number of times a bonus or deposit has to be wagered before any winnings unlock for withdrawal.