a large cash prize in a game or lottery, especially one that accumulates until it is won.
Phrases
hit the jackpot
informal
1win a jackpot.
2have great or unexpected success, especially in making a lot of money quickly:the theatre hit the jackpot with its first musical
Origin:
late 19th century: from jack1+ pot1. The term was originally used in a form of poker, where the pool or pot accumulated until a player could open the bidding with two jacks or better
jackpot in other Oxford dictionaries
Definition of jackpot in the US English dictionary
