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Plain English
The betting glossary
Bookies love a bit of jargon. Here's what it all actually means — from accumulators and each-way to the house edge, overround and self-exclusion. Start typing to search, or jump to a letter.
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A
Accumulator (acca)
A single bet combining several selections, where all must win for it to pay out. Big potential returns, but the odds of every leg landing are multiplied together — so they're far harder to win than they look.
Ante-post
A bet placed well in advance of an event (often days or weeks). Prices can be bigger, but your stake is usually lost if your selection doesn't run.
Arbitrage ("arbing")
Backing all outcomes across different bookmakers to try to lock in a small profit from price differences. In practice it's heavily restricted by operators and not a reliable income.
B
Bankroll
The total pot of money you've set aside for gambling — and can afford to lose. Managing it with small, fixed stakes is the core of staying in control. Try the bankroll planner →
Banker
A selection a punter is especially confident in, often used as the anchor of a multiple bet. "Confident" never means certain — there are no safe bets.
Bookmaker (bookie)
The company that sets odds and accepts bets. Its prices always build in a margin, which is why the bookmaker wins over time.
Both Teams To Score (BTTS)
A football market betting on whether both sides will score at least one goal.
C
Cash out
Settling a bet early for a value the bookmaker offers before the event finishes — locking in a smaller win or cutting a loss. Convenient, but the price always favours the operator.
Correct score
Predicting the exact final score of a match. High odds because it's hard to get right.
Combination bet
A bet covering multiple selections in several smaller bets (e.g. a Trixie or Yankee), so you can still get a return if not everything wins.
D
Decimal odds
Odds shown as a single number (e.g. 2.50) representing your total return per £1 staked, including the stake. 2.50 means £2.50 back for every £1. Convert odds →
Double
An accumulator with exactly two selections; both must win.
Dutching
Splitting a stake across several selections in one event so you win the same amount whichever of them comes in.
E
Each-way
Two bets in one: half your stake on the selection to win, half on it to "place" (finish in the top few). Common in horse racing. A tenner each-way →
Edge (house edge)
The built-in mathematical advantage the operator holds on every bet. It can't be beaten over time — the more you play, the more certain the loss. Why the house always wins →
Even money (evens)
Odds of 1/1 (2.00 decimal): you win the same as you stake. Implied probability 50%.
Expected value (EV)
The average result of a bet if it were repeated many times. For players, gambling is "negative EV" — the long-run expectation is a loss.
Exchange (betting exchange)
A platform where players bet against each other rather than a bookmaker, allowing you to "lay" (bet against) an outcome. The exchange takes a commission.
F
Favourite
The selection with the shortest odds — the outcome the market thinks is most likely. Favourites lose far more often than newcomers expect.
Fixed odds
Odds agreed at the moment you place the bet, which don't change afterwards (unlike spread betting).
Fractional odds
The traditional UK format (e.g. 6/4), showing profit relative to stake: 6/4 returns £6 profit for every £4 staked. Convert to decimal →
Free bet
A promotional bet funded by the operator, usually with conditions attached. The "free" stake is typically not returned with winnings, and wagering requirements apply.
G
Gambler's fallacy
The false belief that past results affect future random ones ("red's due after five blacks"). Each spin or draw is independent — the odds never "even out". The psychology traps →
GAMSTOP
A free UK scheme that lets you self-exclude from every licensed online gambling site and app at once, for 6 months to 5 years. gamstop.co.uk
H
Handicap
A market that gives one side a virtual head start or deficit to even out a mismatch, creating closer odds.
Hedge
Placing a second, opposing bet to reduce risk or lock in a position on an existing bet.
House edge
See Edge — the operator's permanent mathematical advantage on every stake.
I
Implied probability
The chance an odds price is built around, found by dividing 1 by the decimal odds (2.00 = 50%, 4.00 = 25%). Across a market these always total more than 100% — that extra is the bookmaker's margin. Calculate it →
In-play (live betting)
Betting on an event while it's happening, with odds that shift in real time. The fast pace makes it especially easy to lose track of time and money.
J
Jackpot
A large top prize, often progressive (growing until won). The odds of hitting one are extremely long, which is exactly why the prize is so big.
L
Lay bet
Betting on something not to happen — only possible on a betting exchange, where you act as the bookmaker for that outcome.
Longshot
A selection with very long odds and a low chance of winning. Tempting payouts, slim reality.
Lucky 15
A combination bet of 15 bets across four selections (singles, doubles, trebles and a four-fold).
M
Margin (overround)
The percentage by which a market's implied probabilities exceed 100%. It is the bookmaker's built-in profit, and the reason betting is negative for players over time.
Martingale
A dangerous staking system of doubling your stake after every loss to recover it. It busts bankrolls fast and runs into table limits — it does not beat the house edge. Why it fails →
Matched betting
Using free-bet offers and an exchange to try to extract promotional value. Accounts are quickly restricted, and it is not a dependable income.
N
Nap
A tipster's most confident selection of the day. Remember: no tipster can reliably beat the odds.
O
Odds
The price of a bet, reflecting how likely the bookmaker thinks an outcome is and how much it pays. Shown as fractional, decimal or American.
Odds-on
A price shorter than evens (less than 2.00 decimal), where you stake more than you stand to win. Implies a probability above 50%.
Outsider
A selection considered unlikely to win, available at long odds.
Overround
Another word for the bookmaker's margin — the total implied probability of a market above 100%.
P
Parlay
Another name for an accumulator — multiple selections combined into one bet where all must win.
Patent
A combination bet of seven bets across three selections (three singles, three doubles, one treble).
Punter
British slang for a person placing a bet.
Push
A tie or void result where the stake is returned and no one wins or loses.
R
Responsible gambling
Keeping gambling safe and fun: setting limits, only staking what you can afford, never chasing losses, and using support tools. Stay in control →
Return
The total amount paid out on a winning bet, including your original stake.
RTP (Return to Player)
The long-run percentage of total stakes a game is designed to pay back — e.g. 95% RTP means a 5% house edge. It's a statistical average over millions of plays, not a promise for any session.
S
Self-exclusion
Choosing to block yourself from gambling for a set period — with one operator, or every UK site at once via GAMSTOP. A powerful tool if you need a break. How it works →
Single
A straightforward bet on one selection.
Spread betting
A high-risk form of betting where winnings and losses depend on how right or wrong you are — losses can exceed your original stake. Best avoided unless you fully understand it.
Stake
The amount of money you put on a bet.
Starting price (SP)
In racing, the official odds of a selection at the moment the event begins.
T
Tipster
Someone who sells or shares betting predictions. No tipster can reliably beat the house edge over time — treat all "guaranteed" claims with deep scepticism.
Treble
An accumulator with three selections; all three must win.
Tote
Pool betting, where stakes go into a shared pot and the payout depends on how many others backed the same outcome.
U
Underdog
The selection seen as less likely to win, priced at longer odds. Opposite of the favourite.
Unit
A standard stake size, usually a small fixed percentage of your bankroll, used to keep staking consistent. Work out your unit →
V
Value
A bet where you believe the true chance of winning is higher than the odds imply. Genuinely identifying value reliably is extremely hard, which is why most punters lose.
Void bet
A bet cancelled for a valid reason (e.g. an event abandoned), with the stake returned.
W
Wager
Another word for a bet, or the act of placing one.
Wagering requirement
A condition on a bonus or free bet stating how many times you must stake it before winnings can be withdrawn. Often high, and easy to underestimate.
Win
A bet purely on a selection finishing first, with no place element.
Know the words. Know the odds.
Understanding the jargon is the first step to betting with your eyes open. Put it into practice with our free tools, or keep things firmly in control.