keep one's trap shut

idiom

Definition of keep one's trap shut

slang
: to not talk about something that someone doesn't want known Can he be trusted to keep his trap shut?

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“Keep one's trap shut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/keep%20one%27s%20trap%20shut. Accessed 27 Nov. 2020.

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