mouth off

phrasal verb

mouthed off; mouthing off; mouths off
informal
: to talk in a loud, unpleasant, or rude way
He got in trouble again for mouthing off to his teacher.
She's always mouthing off about how much better she could run the company herself.

Examples of mouth off in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Talking of having to listen involuntarily to people mouthing off on subjects that should be banned, the recitation of a prior night’s dream has to be the worst. Louis J. Esterhazy, WWD, 20 Feb. 2025 Paying tribute to an underappreciated profession, Late Shift offers a portrait of workaday courage, not least when Floria mouths off to a surgeon on behalf of a patient who feels abandoned. Sheri Linden, The Hollywood Reporter, 19 Feb. 2025

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Cite this Entry

“Mouth off.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mouth%20off. Accessed 29 Mar. 2025.

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