[give] the game away
1
to reveal something that one was supposed to keep as a secret or surprise
The idiom "give the game away" originated from the world of sports and games, specifically referring to the unintentional disclosure of one's strategy, intentions, or secrets, leading to a disadvantage or loss in the game. The phrase is used to suggest that by revealing crucial information or making a mistake, someone unintentionally provides an advantage to their opponents, compromising their chances of winning or achieving their desired outcome.
- The chess player gave the game away by making a careless move, allowing their opponent to capture their queen.
- The team's quarterback inadvertently gave the game away by revealing their offensive strategy during a press conference.
- The spy accidentally gave the game away by mentioning classified information in a public conversation, jeopardizing the mission.
- The poker player's nervous reaction gave the game away, indicating that they had a weak hand.
- The contestant gave the game away by answering a question incorrectly during the final round of the quiz show.