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
No 10 is not shooting its mouth off in public in reply, but folk I speak to in government are resolute.
From BBC ● Mar. 3, 2026
Horseradish isn’t clamoring to burn your mouth off.
From Salon ● Sep. 2, 2025
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
But Billy Deel had to go and shoot his mouth off about giving me the ring.
From "The Glass Castle" by Jeannette Walls
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.
