open (one's) big mouth

(redirected from open our big mouth)
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open (one's) big mouth

To say something that is meant to be a secret; to say something in an indiscreet, noisy, or boorish manner. Why did you have to open your big mouth about my crush on Tommy? Why couldn't you just keep it between us? We would have gotten away with the plan if she hadn't opened her big mouth!
See also: big, mouth, open
References in periodicals archive ?
I am hoping that we can open our big mouths together.
We are both now at an age where we can, I agree, be sure to continue to open our big mouths, for as long as we retain our health; but our time is limited.
The great thing about the FA Cup is that anything can and usually does happen, which is why those of us who open our big mouths often find ourselves keeping them open for the inevitable humble pie that follows.