someone who fights in unorganized and unprofitable fights, planned or at the heat of the moment. no rules, no gloves, sometimes weapons and usually ends pretty fast, and is not to be confused with people getting jumped or jumping someone with uneven numbers.
oh, I know him, he is a pretty tough streetfighter.
Your everyday normal person, who is not medically retarded, but acts in a way that makes you think, "man, that dumbfuck is retarded!" Used as to not offend medically retarded people.
Man, that fucker almosthit my car pulling out of the parking lot, what the streetard!