open (one's) big mouth

(redirected from open your 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 ?
But no, you had to go and open your big mouth didn't you?
Talk has never been cheaper in rugby union - if you open your big mouth there are too many people waiting to stick your foot right back down it.
You may be a music millionaire but you should think before you open your big mouth
There wasn't much point in them going through all that suffering only for you to then open your big mouth and preach about the so-called joy of taking drugs, was there?