What's the English meaning of "let the cat out of the bag"?

don't let the cat out of the bag dont' let the cat out of the bag的意思 john let the cat out of the bag. Don't let the cat out of the bag.What does it mean?______ let the cat out of bag 的中文意思 Let the cat out of "let it be." what's the meaning of the sentences? What's the meaning of "nine times out of ten ". let the cat out of the what 's the meaning of. What's the meaning of '@'? what's the meaning of