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Mouth off Meaning in English

expression

ˈmaʊθ/ /ˈɔf
MOWTH-AWF
mʌʊθ/ /ˈɒf
MOWTH-OFF

Definition

To speak in a rude, disrespectful, or bold way, often complaining or criticizing, especially to someone in authority.

Usage & Nuances

Informal, sometimes mildly rude. Used mostly in negative contexts about being disrespectful to authority (parents, teachers, bosses). Often follows 'at' ("mouth off at someone"). Synonyms: 'talk back', 'sass'. Avoid using with people you don't know well.

Example Sentences

Don't mouth off to your teacher.

basic

He got in trouble for mouthing off in class.

basic

Kids should learn not to mouth off at their parents.

basic

Why are you always mouthing off when someone gives you advice?

natural

You shouldn't mouth off at your boss if you want to keep your job.

natural

He got suspended for mouthing off at the coach during the game.

natural