'let the cat out of the bag' definitions:
Definition of 'let the cat out of the bag'
(from WordNet)
verb
Divulge confidential information or secrets; "Be careful-- his secretary talks" [syn: spill the beans, let the cat out of the bag, talk, tattle, blab, peach, babble, sing, babble out, blab out] [ant: keep one's mouth shut, keep quiet, shut one's mouth]