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Idiom

let the cat out of the bag

idiom (verb phrase) B2
/lɛt ðə kæt aʊt əv ðə bæɡ/

Meanings

idiom (verb phrase)

To accidentally reveal a secret or hidden plan.

Visual cue for let the cat out of the bag — meaning 1

Definition

To let the cat out of the bag means to reveal a secret, usually by accident.

If you let the cat out of the bag, you reveal information that was supposed to stay secret. This often happens unintentionally, for example by saying something at the wrong time. People use it when a surprise or plan is ruined because the secret is no longer hidden.

Examples

  • I let the cat out of the bag about her promotion before the meeting.
  • Try not to let the cat out of the bag; it’s supposed to be a surprise.
  • He let the cat out of the bag when he mentioned the engagement at dinner.
  • Someone let the cat out of the bag, and now everyone knows our plan.
  • Don’t let the cat out of the bag by posting pictures too early.