open (one's) big mouth

(redirected from opened her 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 ?
She had opened her big mouth and it was now her responsibility.
He's furious that Becky opened her big mouth without asking him first, and even when she later apologises, it makes him think that they shouldn't get married.
ONCE again Maggie Thatcher has opened her big mouth without giving any thought to what she says.
Whenever Stree' Paw'ah opened her big mouth, something stupid came out.