roarer

noun3

1. •
   One who roars.
2. •
   (slang, no longer used) A broken-winded horse.

   • He had never before been so much struck with the fact that this unfortunate bay was a roarer […] — 1871
3. •
   (no longer used) One of a group of young men who would carouse in taverns, then pick brawls on the street for entertainment.