keep one's mouth shut

Also found in: Idioms.
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Verb1.keep one's mouth shut - refrain from divulging sensitive information; keep quiet about confidential information; "Don't tell him any secrets--he cannot keep his mouth shut!"
keep quiet, shut one's mouth
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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References in periodicals archive
The right to keep one's mouth shut, the decision continues, safeguards a "vitally important restraint on the government's coercive powers." The court even compared the guards' investigative methods to the hated "writs of general assistance" that British troops long ago used against American colonists.
THE RIGHT NOT TO SNITCH
It often needs an open mind to keep one's mouth shut.
Jokes
But there are times when one should keep one's mouth shut. That, Mr Orde, was one of those times.
Kevan Furbank Column: Loose talk's out of Order
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