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let the cat out of the bag
let the cat out of the bag
Fig. to reveal a secret or a surprise by accident. When Bill glanced at the door, he let the cat out of the bag. We knew then that he was expecting someone to arrive. It's a secret. Try not to let the cat out of the bag.
let the cat out of the bag
to tell something that is a secret, often without intending to Amazingly, not one of the people who knew about the surprise let the cat out of the bag.
let the cat out of the bag
to tell people secret information, often without intending to I was trying to keep the party a secret, but Jim went and let the cat out of the bag.
let the cat out of the bag
Give away a secret, as in
Mom let the cat out of the bag and told us Karen was engaged. This expression alludes to the dishonest practice of a merchant substituting a worthless cat for a valuable pig, which is discovered only when the buyer gets home and opens the bag. [Mid-1700s] Also see
pig in a poke.
let the cat out of the bag
To let a secret be known.