game is up, the

the game is up

The plan or scheme has been discovered and/or thwarted; the game, trick, or deception is at an end. The game is up, Smith! The police found your fingerprints all over the safe. We tried to smuggle a kitten into the house, but when Mom saw me carrying a saucer of milk, I knew that the game was up.
See also: game, up

game is up, the

Also, the jig is up. The trick or deception has been exposed. For example, When they took inventory they realized what was missing, and the game was up for the department head . This expression dates from the mid-1800s and uses up in the sense of "over" or "lost." The variant employs jig in the sense of "trickery," a usage dating from about 1600.
See also: game