the game is up meaning

The scheme has failed, all is revealed

[American idiom]
The deception is over.; The illegal activity 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.

• game is up:    [American slang]Th ...
• the game is up.:    [American slang]Fi ...
• be game:    [American slang]to ...

Examples

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1. the game is up.
2. encroach, presume, and the game is up
3. he knows the game is up
4. the game is up
5. murat sees the game is up if he lets the sergeant have his say . with an affectation of surprise a true gascon