stop someone's mouth
stop (one's) mouth
obsolete To keep someone from being able to speak, either physically or emotionally. I stopped his mouth with my finger, and told him to be silent for a moment. The bitter sadness stopped my mouth halfway through my speech, and I was unable to say another word for a full minute.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
stop someone's mouthbribe or otherwise induce a person to keep silent about something.
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