open (one's) 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 ?
Or rather that was the case until Mr Bloom opened his big mouth once more and shared with us some more of his wisdom, this time on his views of women.
He doesn't have a clue, of course, in my view I think he has just opened his big mouth and spoken too soon.
His conduct over Michael Shields was, to put it mildly, unfortunate and to put it more strongly diabolical, and now he has opened his big mouth over the rape of unfortunate girls showing what some people have interpreted as racial bias.
He was looking good until Lineker opened his big mouth and started talking about an Englishman winning it.
Furious mum Eileen Williams, 28, who watched the event with five-year-old son Callum, added: "He should have thought about what he was saying before he opened his big mouth.
We got off to a great start and played the front nine exactly howwe wanted - and then Bradley opened his big mouth and mentioned that on the 10th tee
We got off to a great start and played the front nine exactly how we wanted - and then Bradley opened his big mouth and mentioned that on the 10th tee
She said: "He should have thought about what he was saying before he opened his big mouth.
We got off to a great start and played the front nine exactly how we wanted ( and then Bradley opened his big mouth and mentioned that on the 10th tee
Dodd said: "We played the front nine exactly how we wanted - and then Bradley opened his big mouth and mentioned that on the 10th tee.
FIFA president Sepp Blatter opened his big mouth again yesterday and slammed the FA's decision to go for another foreign boss.
Perhaps he should have visited the original CHAS hospice to see what he is opposing before he opened his big mouth and polluted the atmosphere.
A AND I wish your cousin had never opened his big mouth.
SO, Oasis guitarist Noel Gallagher has opened his big mouth again, this time having a go at Annie Lennox and everyone else performing at Live 8.
Earlier in the show, 28-year-old Barlow opened his big mouth again - to give away the answer to a quiz and win a listener pounds 10,000.