Meaning: to speak in a loud and annoying way, especially when criticizing or complaining about something
- mouth off Some guy in the pub got punched because he was mouthing off about something and I guess he upset someone.
- mouth off After he'd had a couple of beers Robert started mouthing off about the evils of big government again last night.
The trouble with inviting Rhonda to a dinner party is that all she does is mouth off about
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Contributor: Matt Errey