1
general::
Phrase(s): The game is up. [and] The jig 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.
McGrawhill's American Idioms And Phrasal Verbs