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
References in classic literature ?
THAT is my idea of good breeding; and those persons who fancy themselves very important, and never open their mouths, quite mistake the matter.
This printer also says in his preface that the book was first written in the time of King Edward III, "In whose time it pleased God to open the eyes of many to see his truth, giving them boldness of heart to open their mouths and cry out against the works of darkness.
Those that want any Feast have just got to open their mouths, and Bruno 'll put some of it in
That's why training them to open their mouth so we can take a look is so important.
They tend to open their mouth and they, sometimes, say things without thinking.
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.
Seeing these superb comic actors again in yet another sharply written satire is enough to make you smile before they even open their mouths.
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.