open (one's) mouth

(redirected from open their 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

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
References in periodicals archive ?
Every voice is muzzled and people are being practically told that if they open their mouth they will face wrath of the men in uniform, he added.
The open your mouth picture is quite incredible - children open their mouth wide open in an unexpected way.
"That's why training them to open their mouth so we can take a look is so important."
4 ( ANI ): A Japanese burger chain has come up with a new way to help women eat big burgers, keeping in mind the social etiquette in Japan that requires women to never open their mouth wide in public.
It is often joked that the only way you know someone is telling lies is to see him or her open their mouth.
It is often joked that the only way you know that someone is lying is to see him or her open their mouth! An old hymn has this request ``God be in my mouth and in my speaking''.
Researchers were able to make 9 of the unconscious patients bring their hands up and open their mouths by stimulating a part of the brain that is linked to those actions in non-human primates.
WOULD it be possible to display subtitles when Am-I-Will and Jessie J open their mouths on The Voice?
We are all for honesty in politics but ministers have a responsibility to think before they open their mouths.
THERE are some people who, each time they open their mouths, seem to put their foot in it.
When Idol contestants open their mouths to sing, the audience hears the sounds produced by air moving through the singer's voice box, or larynx.
When they're out foraging and find a seed, they simply open their mouths and tuck it in.
Eventually, "the skin of the cheek becomes hard as a brick," and people with the condition become unable to open their mouths, says Sylvie-Louise Avon of Laval University in Quebec City.
They're there behind the scenes to administer hugs as hopefuls are given the thumbs up or the heartbreaking news that they're rubbish and should never dare open their mouths again.
A seventh grader interviewed by a reporter said that after they were made to take off their clothes, he and his classmates were told to open their mouths and bend over."