patent: A popular multiple bet, which constitutes seven bets from three selections: 3 singles, 3 doubles and 1 treble.
in-running: A term used to describe a market that is still open despite a match already happening.
lay: What a bookmaker does when he takes a bet from you. He accepts the bet at the odds you both agree upon, or he lays the odds.
nap: The best bet of the day in the opinion of the tipster concerned.
nb (next best): The same tipster's "Next Best" selection.
odds: Collective noun for the prices in a market, or for general prices given to selections in a market.
price percentage: Used to calculate over-roundness. A completely fair book is classified as 100% "over-round". However the 'bookmakers' profit margins mean the figure is almost always above 100%. Generally, bookmakers try to make most Books around 110% over-round, meaning no matter how many bets they take on each selection in a race/match their profit is at least 10% whatever the winner. It is the reason why prices fluctuate so readily in horse races etc..
single: A straight bet on one event happening.
treble: Same as a Double and Accumulator but with just three selections.
yankee: A popular multiple on four selections, which constitutes: 6 doubles, 4 trebles and 1 fourfold.
