the game is up

the game is up

1. (informal, idiomatic) Secret plans or activities have been revealed, usually leading to their failure.

• “the game is up” (US) / “the game is up” (UK) in Macmillan English Dictionary.
• “the game is up”, in Collins English Dictionary.
• “the game is up”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “game is up”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.