Definition of mouth off in English:
1 informal Talk in an unpleasantly loud and boastful or opinionated way: he was mouthing off about society in general
More example sentences
- When he mouths off to a pretty young teacher, he apologizes: ‘I'm sorry I sounded off on you.’
- Nobody shows off or mouths off quite as good as a Leo.
- If a kid mouths off, maybe he doesn't like you or maybe he's seen his mother beaten up by her boyfriend.
1.1 (mouth off at) Loudly criticize or abuse.
- She had had to endure being mouthed off at all her childhood.
- And so when someone blows up and mouths off at a guard or goes after somebody else about their kids, I totally understand where that emotion and that lightning-fast trigger comes from.
- Some guy mouths off at him and they begin brawling.
talk insolently, be disrespectful
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