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English definition of “keep your mouth shut”

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keep your mouth shut

informal
B2 to not talk about something: I don't know whether to tell him what I know or keep my mouth shut.
Translations of “keep your mouth shut”
in Chinese (Traditional) 保持緘默,守口如瓶…
in Chinese (Simplified) 保持缄默,守口如瓶…
(Definition of keep your mouth shut from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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