mouth off

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mouth off

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 mouthing off all over town.
2. To make disrespectful comments; to sass someone. You're going to get detention again if you keep mouthing off to your teacher.
See also: mouth, off

mouth off

to speak out of turn; to backtalk. If you mouth off, I will ground you for three weeks. Don't mouth off at me, buster!
See also: mouth, off

mouth off

1. Complain or express one's opinions loudly and indiscreetly, as in She was always mouthing off about the other members. [Slang; 1960s]
2. Speak impudently, talk back, as in He got in trouble by mouthing off to his teacher. [Slang; 1960s]
See also: mouth, off

mouth off

v. Slang
To express one's opinions or complaints in a loud, indiscreet manner: Quit mouthing off about what you think is wrong, and go do something about it! Don't mouth off to your parents like that!
See also: mouth, off

mouth off

in. to give (someone) back talk. If you mouth off, I will ground you for three weeks.
See also: mouth, off
References in periodicals archive ?
We won't get drawn into stupid press interviews and go shouting our mouths off in the paper.
We're not as fancied as we were in the past so we won't go shouting our mouths off, we'll just keep quiet and try to sneak in.
"I also despair at players spouting their mouths off about wanting to move for personal reasons.