open (one's) mouth

(redirected from opens 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 periodicals archive ?
He is an embarrassment to the club every time he opens his mouth and then accomplishes nothing to justify his appointment.
May I remind Mr Salmond that he is not speaking for all Scots every time he opens his mouth.
Every time the celebrity chef opens his mouth, he puts his foot in it.
We do not know fact from fiction when he opens his mouth.
It seems like he might be one of those guys who might just sit there and be really quiet all the time, and then when he finally opens his mouth he says some profound wisdom.
Kerstetter, whose gawky frame, unkempt hair, and wide, pale eyes lend him an unhinged air even before he opens his mouth, gives a genuinely unsettling performance.
Joe Turner opens his mouth, and it comes out in Elvis Presley's bank account.
FATHER HESBURGH, the Spirit of Notre Dame: "Ten years after the average athlete graduates, everyone will have forgotten when and where he played, but every time he opens his mouth, everyone will know whether he was educated.
Next, he opens his mouth and squeezes out droplets from what is called a gular gland, rubbing these into the wing sac.
There is something saintly about his persona--that is, until he opens his mouth.
And until Steinbrenner opens his mouth, it looks like the city's Mayor will keep opening both his mouth and city coffers.
One of my teachers says that if a baby opens his mouth in the uterus (the muscle where the baby grows while inside its mother), it can be a big problem.
He's creating problems for the future as he digs himself deeper into a hole every time he opens his mouth.
Every time he opens his mouth someone catches him in a lie.