run one's mouth off

run one's mouth off (third-person singular simple present runs one's mouth off, present participle running one's mouth off, simple past ran one's mouth off, past participle run one's mouth off)

1. Alternative form of run off at the mouth
   • 2004, Modest Mouse (lyrics and music), “Float On”, in Good News for People Who Love Bad News:

     I ran my mouth off a bit too much, oh, what did I say? / Well, you just laughed it off, it was all okay

• run off one's mouth