open (one's) mouth

(redirected from opens her mouth)

open (one's) mouth

To say something, especially that which is indiscreet, boorish, or meant to be a secret. Why did you have to open your mouth about my crush on Tommy? Why couldn't you just keep it between us? You've got to make sure that he never opens his mouth about what went on here today.
See also: mouth, open
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

open your (big) ˈmouth

(informal) say something when you should not: Why do you always have to open your big mouth? Can’t you just keep quiet sometimes?
See also: mouth, open
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
They must be head-butting palace walls every time she opens her mouth JOHN NIVEN I don't know if you've been to an A&E recently but give the Tories 15 years and waiting rooms will start looking like Mad Max meets World War Z.
Tell her how beautiful she is and what a shame you think it is that every time she opens her mouth a torrent of foul language comes out.
If she opened her ears as often as she opens her mouth, Coun Alden would hear what tenants really think about the everyday services they receive.
she puts her fingers to the reed opens her mouth and feels her throat:
As for Moira Stuart (her of the stiff upper lip) I find her difficult to understand as she never opens her mouth properly, God help anyone hard of hearing when listening to her deliver the news.
Lyricist and singer Crystal Joy is in jeans, but as soon as she opens her mouth, she becomes a steamy chanteuse delivering saucy lines: "I'll be the sugar in your cup of tea ...
I am a small African woman who opens her mouth and screams into the dense burning foliage where in a night made bright I hide
Sweating, heavy breathing, painful sounds when she opens her mouth. Panic attack?
Deirdre looks like she might burst a blood vessel every time she opens her mouth and I can't even bring myself to talk about Shelley and Charlie.