mouth off
Britishverb
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Complain or express one's opinions loudly and indiscreetly, as in She was always mouthing off about the other members . [ Slang ; 1960s]
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Speak impudently, talk back, as in He got in trouble by mouthing off to his teacher . [ Slang ; 1960s]
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Yet apparently it’s just easier for people to mouth off without doing any research at all.
From MarketWatch • Jun. 5, 2026
He doesn't go shouting his mouth off, and then delivers in the ring.
From BBC • Apr. 13, 2023
"She's trying to defend her daughter, why doesn't she stop shouting her mouth off and take ownership of how she raised her daughter," Imbriale told Fox News Digital Tuesday.
From Fox News • Jan. 11, 2022
Madeline realizes that maybe she shoots her mouth off too much.
From Salon • Jun. 7, 2019
“Generally,” he finally said, “it is neither wise nor prudent to mouth off to a junior high school teacher. Especially to one who has been a sergeant in the United States Army.”
From "Okay for Now" by Gary D. Schmidt
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
