A white person. Derived from the -CRACK- sound of a whip hitting someone in slavery times. Sometimes used as a mild insult from a black person to a white person(1) but sometimes a term of endearment(2). Also see nigga
(1)Black Guy: Look at that cracker, tryin to wear his shit like us, we should bust his punk ass!
(2)Black(Or White) Guy: Hey cracka, whassup man?
White Guy: Nothin much. You know, thats fucked up, you can call me a cracka but I cant call you a nigga.
Guy: He's got a 5 point star tattoo. What's that for?
Guy 2: He's a Blood gang member. Shit, I'm not staying here!
Person1: You know what I really want for christmas?
Person1: Oh man, how did you know. (sarcastically
Person2: Everyone wants Crack in the Box :)
This type of music sets the scene for something extremely kick ass (e.g. cat burnings.)
Guy 1: Holy shit! Did he just light that fucking cat on fire!?
Guy 2: Oh yeah.
Guy 1: Wow! This Doom music totally sets the scene for it!