the chief prize or the cumulative stakes in a game or contest, as in bingo, a quiz contest, or a slot machine.

Poker . a pot that accumulates until a player opens the betting with a pair of predetermined denomination, usually jacks or better. ?

an outstanding reward or success.

hit the jackpot

Informal .

to achieve a sensational success; have sudden luck

The firm has hit the jackpot with its new line of computers.

to win a jackpot.

noun

find , winnings , reward , stakes , pot , pool , kitty , prize , award , bonanza , windfall