bruiser

Short definition from Wiktionary

Noun

1. 1
   In contact sports, an athlete whose size, strength, and/or aggressiveness make it likely that they will cause athletes on the opposing team to suffer physical punishment.
2. 2
   A tall, strong, heavily built person, usually a man, especially one prone to physical violence; a strong and tough person.
3. 3
   A machine for bruising oats.
4. 4
   A person who enjoys arguing with others.
5. 5
   A professional boxer.