English Idiom – Let the cat out of the bag.
To reveal a secret, usually by accident.
We often use it when a surprise is spoiled: “Don’t let the cat out of the bag – the party is supposed to be a surprise!” Once the cat is out of the bag, it’s very hard to get it back in!
Related Cat Idioms:
- Cat Idioms – our full collection.
- Cat got your tongue? – why aren’t you speaking?
- Copycat – someone who copies others.
- Curiosity killed the cat – being too curious can get you into trouble.
- Fat cat – a negative term for a very rich businessperson.
- Like the cat that got the cream – very pleased with yourself.
- Look what the cat dragged in! – a joke about someone who arrives looking messy (or late).
- No room to swing a cat – a very small space.
- Raining cats and dogs – raining very heavily.
- When the cat’s away, the mice will play – people misbehave when the boss is absent.
Usage:
- Someone accidentally reveals a surprise.
- You remind a friend not to share a secret.
- Private information gets out by mistake.
Example:
- “Jack let the cat out of the bag last night. I can’t believe you’re finally going to tie the knot!”
Learn More
Look it upLet the cat out of the bagWiktionaryWhat is an idiom?
An idiom is a word or phrase that is not taken literally. An idiom is an expression that cannot be understood from the meanings of its individual words, but has a separate meaning of its own.
Love animal idioms? See our full list of 50 animal idioms in English, with meanings and examples.
Frequently Asked Questions
To reveal a secret, usually by accident.
Being too curious or nosy can get you into trouble.
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