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keep one's mouth shut
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Idioms and Phrases
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 .Advertisement
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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