noun
1. : a bet made with a player other than a house that customarily books all bets or other than with the shooter (as in craps)
2. : a bet made by the shooter in craps on any event other than the outcome of his center bets
3. : a bet (as on whose hand holds the highest spade) made on an event not integral to the game being played
4. : a bet with another player in a game additional to the regular stakes for which the game (as in bridge or golf) is being played