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 ?
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.