1. A strapping, often hirsute, man. Get one of those cavemen from the gym to help you move all this furniture!
2. A pejorative term for a man who lacks manners or refinement. That guy's a total caveman—he barely said hello to me and would only grunt in response to my questions.
caveman
n. a strong, virile man. He’s sort of a caveman, big and hairy.