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let the cat out of the bag

to reveal a secret accidentally

In Idioms & Sayings

In more detail

(idiom) to reveal a secret or tell someone something that was supposed to be kept private

Examples

• I didn't mean to let the cat out of the bag about the surprise party, but my sister figured it out anyway.

Nearby in Idioms & Sayings

cost an arm and a leg, spill the beans, hit the nail on the head, burn the midnight oil, the ball is in your court, pull someone's leg