Something said in retaliation to a severe insult. Normally a conversational stopper.
Bob: Man, fuck you.
Jim: I will kill your family.
An EXTREMELY white person who attempts to be "gangsta" (cool black person) in order to "pimp out" with the "bitches" and the "hos". Therefore he dresses, speaks, acts and for all practical purposes is a black person aside from the fact that they are not. (normally hated by all "gangstas" for being posers)
Bitch: ooooo...he's a wangsta...
Gangsta: Damn, Im gonna' fuck that wangsta UP!