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mouth off Informal

Meaning: to speak in a loud and annoying way, especially when criticizing or complaining about something

For example:

  • 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.

Quick Quiz:

The trouble with inviting Rhonda to a dinner party is that all she does is mouth off about
  1. how nice we are
  2. how bad the government is
  3. the beauty of ancient Greek poetry

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