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
At 56, Imperioli is no longer the scrawny kid who dared mouth off to Joe Pesci’s volcanic gangster in “Goodfellas.”
From Los Angeles Times ● Nov. 21, 2022
Westminster is full of people who love shouting their mouth off.
From BBC ● Jul. 5, 2022
"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
Whenever I screw up or mouth off, I miraculously become a young man.
From "Things Not Seen" by Andrew Clements
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.
