mouth off

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From mouth + off.


to mouth off (third-person singular simple present mouths off, present participle mouthing off, simple past and past participle mouthed off)

  1. (intransitive, idiomatic) To complain or otherwise express oneself in a loud, immoderate manner.
  2. (intransitive, idiomatic) To talk impudently, especially to one's superior.
    • 2008, Herbert, “Play It Again, Brian”, in Family Guy:
      And don't you mouth off to me, or I'm gonna slap you right in your penis.


See also[edit]