What is the jig is up?

"The jig is up" is an idiomatic expression in English that implies a scheme, deception, or trick has been discovered or is no longer effective. It's often used to suggest that someone's plans have been uncovered and that they can no longer continue with their dishonest or secretive behavior without being caught. The phrase is typically employed in informal contexts and can be related to both minor and serious matters.

The origins of the phrase are somewhat unclear, but "jig" in this context likely refers to a kind of trick or game, and the expression conveys the sense that the time for playing or engaging in that deception has ended. This expression is similar to others like "the game is up" and often used in literature, movies, and everyday conversation to indicate the end of a ruse or the exposure of a hidden agenda.