breach of the peace

noun2

1. •
   The legal offense of engaging in public behavior which is violent, rowdy, or disruptive.

   • [T]he sheriff turned his eyes again. . . . "What have we here?" he cried; "two men boxing! Has there been a breach of the peace?" — 1823
2. •
   Any public disturbance or disorderly behavior.

   • Polly's suspicions were louder, her temper became uncertain; once or twice she forgot herself and used language calculated to cause a breach of the peace. — 1898