A guy who will never start a fight, but once you touch him he'll never stop no matter what you do.
Guy #1: "That dumb punk over there is a wuss"
Guy #2: "Looks pretty tough to me"
Guy #1: "Yeah, but he only talks tough, Im gonna go kick his butt"
Guy #3: "I wouldn't do that if I were you, three of my friends tried beating him in the head with a rock, and he got up and chased 'em all down and tore 'em a new one...man don't fade.