NFL Prop Bets Glossary: Every Term UK Punters Need
Available in US
I keep a sticky note on my monitor with five betting terms I got wrong during my first year of NFL prop betting. “Handle” and “hold” confused me for months – they sound similar, they both involve money, and I used them interchangeably in conversations with sharper bettors who politely didn’t correct me. When I finally understood the difference, a lot of industry reporting that had seemed contradictory suddenly made sense. Same-game parlays now account for 35-40% of gross gaming revenue at major operators, but that statistic only lands if you know what GGR actually measures.
This glossary covers every term you’re likely to encounter in NFL prop betting, with definitions written for UK punters who are fluent in the language of football and horse racing betting but new to American sports terminology.
Terms A-H
Accumulator (acca). A multi-leg bet where all selections must win for the bet to pay out. The US equivalent is a “parlay.” In prop betting, accumulators can combine player props from multiple games or from the same game (see: bet builder).
American odds. The odds format used in the US, expressed as positive (+200) or negative (-150) numbers. Positive numbers show profit on a 100-unit stake; negative numbers show how much you must stake to win 100 units. UK punters can convert to decimal: +200 = 3.00, -150 = 1.67.
Anytime touchdown scorer. A prop bet that a named player will score a touchdown at any point during the game. The most popular touchdown prop market at UK bookmakers.
Bet builder. The UK bookmaker term for a same-game parlay – a single wager that combines multiple prop selections from one game. Called “SGP” in US terminology.
Chalk. The favourite in a betting market. A “chalky” prop is one where the favourite is heavily backed by the public, often resulting in short odds. Betting chalk consistently means paying a premium for probability.
Closing line. The final odds offered on a prop at the time of kickoff. Consistently getting better odds than the closing line (positive CLV) is the strongest indicator of long-term profitability.
CLV (closing line value). The difference between the odds you received and the closing odds. Positive CLV means you beat the market; negative CLV means you didn’t.
Edge. Your estimated advantage over the bookmaker’s implied probability. If the bookmaker implies 50% and your model estimates 57%, your edge is 7 percentage points.
Expected value (EV). The mathematical expectation of a bet’s long-term return. A positive EV bet (+EV) is one where the true probability exceeds the implied probability, meaning it’s profitable over a large sample.
Handle. The total amount of money wagered on a market or event. On traditional bets, bookmakers retain 5-7% of the handle as revenue. The distinction from “hold” is critical: handle is what’s wagered, hold is what the bookmaker keeps. On parlays, the hold can reach 20-30% or more.
Hold (hold rate). The percentage of total handle that the bookmaker retains as revenue. A 7% hold means the bookmaker keeps 7 pounds for every 100 pounds wagered across both sides of a market.
Terms I-P
Implied probability. The probability encoded in a set of odds. Calculated by dividing 1 by the decimal odds. Odds of 2.00 imply a 50% probability; odds of 1.50 imply 66.7%.
Juice (vig, vigorish). The bookmaker’s commission built into the odds. Also called “overround” in UK terminology. It’s the reason implied probabilities on both sides of a market add up to more than 100%.
Line. The threshold set by the bookmaker for an over/under prop. “Mahomes Over 275.5 passing yards” – 275.5 is the line.
Line shopping. Comparing the odds on the same prop across multiple bookmakers to find the best available price. The single most impactful habit for reducing the effective house edge.
Moneyline. A bet on which team will win the game outright, with no point spread involved. Not a prop bet, but frequently referenced in prop analysis for context.
Octopus. A prop bet where a player scores a touchdown and converts the ensuing two-point conversion attempt, totalling 8 points. Rare and high-paying.
Over/under (O/U). The two sides of a prop bet. “Over 275.5 passing yards” means you’re betting the player exceeds that number. “Under” means he falls short.
Overround. The bookmaker’s margin, expressed as the amount by which the implied probabilities on all outcomes exceed 100%. A market with 104% total implied probability has a 4% overround.
Player specials. The UK bookmaker term for player prop bets. “Specials” is used broadly at UK platforms to describe proposition markets.
Prop (proposition bet). A bet on a specific event or performance within a game, rather than the game’s final outcome. Covers player performances, team milestones, and novelty events.
Push. A bet that results in a tie – the actual result exactly matches the line. Most props use half-point lines (275.5) to avoid pushes, but they can still occur on whole-number lines. Stakes are returned on a push.
Terms Q-Z
Same-game parlay (SGP). A parlay where all legs come from the same game. The US equivalent of a UK bet builder. Carries higher margins than traditional parlays because the bookmaker prices in correlation adjustments.
Sharp. A knowledgeable, professional bettor whose action moves lines. “Sharp money” refers to bets from these experienced operators. Sharp action on a prop line is a signal that the line is mispriced.
Square. A casual, recreational bettor. Not a pejorative in professional circles – it simply describes the majority of the betting public whose action tends to follow popular opinion rather than analytical models.
Steam move. A sudden, significant line movement caused by coordinated sharp action across multiple bookmakers. A steam move on a prop line suggests strong consensus among professional bettors that the line is mispriced.
Straight bet. A single wager on one outcome. Contrasted with parlays and accumulators. Straight bets carry the lowest house edge of any bet type.
Totals. A bet on the combined score of both teams. A game-level prop, sometimes called the over/under for the entire match.
Units. A standardised measure of betting stake. One unit equals your standard bet size, whatever that may be. Tracking results in units allows for comparison regardless of absolute stake size. “+10 units” means profit equal to 10 times your standard bet.
Value bet. A bet where your estimated probability of the outcome exceeds the implied probability in the bookmaker’s odds. Finding value is the core skill of profitable prop betting.
This glossary covers the vocabulary you’ll encounter in every prop betting guide, podcast, and analysis thread. Bookmark it, reference it when a term trips you up, and don’t make the mistake I made – using “handle” and “hold” interchangeably in front of someone who knows the difference.
What is the difference between ‘handle’ and ‘hold’ in NFL prop betting?
Handle is the total amount of money wagered on a market. Hold is the percentage of that handle the bookmaker retains as revenue. If punters wager 1,000 pounds total on a prop market and the bookmaker keeps 70 pounds after paying winners, the handle is 1,000 and the hold is 7%. Handle measures volume; hold measures profit margin.
What does ‘chalk’ mean in NFL prop markets?
Chalk refers to the favourite or the most expected outcome. A ‘chalky’ prop bet is one where the public heavily backs the obvious choice – for example, a star running back to score a touchdown at short odds. Betting chalk consistently means accepting lower returns for higher probability, which can erode value if the lines are efficiently priced.
Prepared by the top nfl Prop Bets editorial staff.
