Meaning Share a secret that wasn't intended to be shared.
Usage Worldwide.
Example
- I thought Mom already knew Jenny was pregnant. She was furious when I mentioned her pre-natal check and let the cat out of the bag.
Pronunciation
Idiom
Let the cat out of the bag
What does "Let the cat out of the bag" mean?
Share a secret that wasn't intended to be shared.
Let the cat out of the bag
Britain, 18th century.