shoot off at the mouth

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shoot off at the mouth

1. To speak without discretion; to speak too loudly or freely, especially about sensitive topics or information. We would have gotten away with our plan if your dumb cousin hadn't started shooting off at the mouth all over town. I figured it went without saying that I didn't want to talk about my divorce at Daniel's wedding, but you just had to go and shoot off at the mouth like that!
2. To be annoyingly or overbearingly talkative, especially in a bragging or boastful manner. There's some guy at the other end of the bar shooting off at the mouth about how far he can throw a football.
See also: mouth, off, shoot
References in periodicals archive ?
The rapper, real name Marshall Mathers III, famously sings in one of his anthems: "I don't want to be another rapper dead, for shooting off at the mouth for things I shouldn't have said.
I think it's teen-agers shooting off at the mouth, angry, somewhat intoxicated and too much testosterone at the wrong time of night,'' Blatt said.