Dictionary of American idioms

GAME IS UP.

game is up.: translation

Thegame is up.&Thejig is up.
Fig.The illegal activity has been found out or has come to an end. •

When the police were waiting for them inside the bank vault, the would-be robbers knew that the game was up.

“The jig is up!” said the cop as he grabbed the shoulder of the pickpocket.