Synonyms

mouth off

British

verb

informal to give an opinion or speak emotionally, often without much care or consideration

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mouth off Idioms

Complain or express one's opinions loudly and indiscreetly, as in She was always mouthing off about the other members . [ Slang ; 1960s]
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.

See Examples For:

mouth off

Yet apparently it’s just easier for people to mouth off without doing any research at all.

From MarketWatch ● Jun. 5, 2026

Sir Keir Starmer isn't a man to shoot his mouth off in public.

From BBC ● Jan. 19, 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

“Since when don’t you turn your mouth off when I’m eating?”

From "The Milagro Beanfield War" by John Nichols

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023