open (one's) mouth

(redirected from open his 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 ?
Insurrection with one accord Banded itself and woke: And Paul was about to open his mouth When Achaia's Deputy spoke
When Dorothy presently asked him a question the Tin Woodman could not open his mouth, for his jaws were tightly rusted together.
One of them grabbed the Marionette by the nose and the other by the chin, and they pulled him unmercifully from side to side in order to make him open his mouth.
At this point, Joe greatly augmented my curiosity by taking the utmost pains to open his mouth very wide, and to put it into the form of a word that looked to me like "sulks.
It is impossible for an Englishman to open his mouth without making some other Englishman hate or despise him.
He needs must open his mouth and pour forth an unwilling, gushing howl.
Now it happens to this sort of men, as to bad hounds, who never hit off a fault themselves; but no sooner doth a dog of sagacity open his mouth than they immediately do the same, and, without the guidance of any scent, run directly forwards as fast as they are able.
Fix, as he bowed, had a stifled feeling, and, going forward, where he ensconced himself, did not open his mouth for the rest of the day.
No human throat could have formed those bestial notes, they were sure, and yet with their own eyes they had seen this white man open his mouth to pour forth his awful cry.
Osborne, my dear; and as for my Mick, I often tell him he should never open his mouth but to give the word of command, or to put meat and drink into it.
a wad of about 10 sheets of paper got wedged fast between Ralph's upper and lower canine teeth preventing him from being able to open his mouth.
I wanted to open his mouth and put my fist all the way down his throat.
The sport needs colourful characters like Ricky, who has never been afraid to open his mouth, or his wallet, in support of our sport.
I asked him to open his mouth, but he refused at the beginning saying that what is in his mouth is a medicine," the corporal said in his statement to the Public Prosecution.
One teenager did have to be taken to the operating room for total anesthesia because he refused to open his mouth, but the tonsil lolly played no role in this incident.