keep one's mouth shut
Be quiet; don't reveal confidential information. For example, The teachers told us to keep our mouths shut during the entire presentation, or You can't tell Carol anything; she's incapable of keeping her mouth shut. Also see hold one's tongue.
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| a stew of meat, vegetables, potatoes, etc. |
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| keep one's mouth shut | |
verb | |
| 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] [ant: babble] |