give the game away
1. To disclose a secret
2. To give up, abandon (a game or contest) (Aust)
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Main Entry: ↑game
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give the game away phrase
to let people know a secret or surprise when you did not want or intend to let them know
The expression on her face gave the game away.
Thesaurus: to tell or reveal a secret or secretssynonym
Main entry: game
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give the (whole) game (or show) away
inadvertently reveal something secret or concealed
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give the ˈgame away idiom
to tell a secret, especially by accident; to show sth that should be kept hidden
Useful english dictionary. 2012.