keep (one's) mouth shut

(redirected from Keep My Mouth Shut)
Also found in: Acronyms.

keep (one's) mouth shut

To not discuss or mention something. He needs to keep his mouth shut and stop telling our family secrets to everyone in town!
See also: keep, mouth, shut

keep one's mouth shut (about someone or something)

Fig. to keep quiet about someone or something; to keep a secret about someone or something. They told me to keep my mouth shut about the boss or I'd be in big trouble. I think I'll keep my mouth shut.
See also: keep, mouth, shut

Keep your mouth shut (about someone or something).

Fig. Do not tell anyone about someone or something. Bob: Are you going to see the doctor? Mary: Yes, but keep your mouth shut about it. Bob: Isn't Tom's uncle in tax trouble? Jane: Yes, but keep your mouth shut about him.
See also: keep, mouth, shut

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.
See also: keep, mouth, shut