shut one's mouth

1 definition found

shut one's mouth - WordNet (r) 2.1 (2005) :

  shut one's mouth
      v 1: refrain from divulging sensitive information; keep quiet
           about confidential information; "Don't tell him any secrets
           --he cannot keep his mouth shut!" [syn: keep quiet, shut one's mouth
           , keep one's mouth shut] [ant: babble,
           babble out, blab, blab out, let the cat out of the bag
           , peach, sing, spill the beans, talk, tattle]