LET THE CAT OUT OF THE BAG
What is the Meaning of the Idiom
LET THE CAT OUT OF THE BAG?
Definition:
to tell (or not keep) a secret
(Think about trying to keep a cat inside a bag! It’s a great picture for how hard it can be to keep an interesting secret.)
Examples:
1. The surprise party is all planned. We are not going to tell Uncle John because he is a terrible liar, and if knows he will be sure to let the cat out of the bag.
2. They wanted to tell us in person that they were expecting a baby, but his mom let the cat out of the bag, when she asked us if we were going to come home after the baby was born.