JACKPOT

noun Date: 1881 1. a. a hand or game of draw poker in which a pair of jacks or better is required to open, a large pot (as in poker) formed by the accumulation of stakes from previous play, b. a combination on a slot machine that wins a top prize or all the coins available for paying out, the sum so won, the top prize in a game or contest (as a lottery) that is typically a large fund of money formed by the accumulation of unwon prizes, an impressive often unexpected success or reward, a tight spot ; jam