jackpot /ˈjakˌpät, ˈdʒækˌpɑt 
/ ▸ noun a large cash prize in a game or lottery, especially one that accumulates until it is won.
– PHRASES hit the jackpot informal 2
have great or unexpected success, especially in making a lot of money quickly: the theater 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
. 
EnglishOxford New American Dictionary
