give the game away

/ˌɡɪv ðə ˈɡeɪm əˌweɪ/INFORMAL · B2

Meaning

to spoil a surprise by revealing what should stay hidden

Examples

  1. 1We were planning a surprise, but Dad gave the game away by asking about Mum's dress size.
  2. 2Don't smile like that, or you'll give the game away.
  3. 3The birthday cake was hidden, but the smell of chocolate gave the game away.
  4. 4Try not to give the game away when Tom arrives; he mustn't know about the party.
  5. 5Who gave the game away? Jo already knows we're flying to Rome for her fortieth.

Grammar

Only give changes: gives, giving, gave, given. Keep the game between give and away.

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