From Rap Dictionary
Cracka!
Crackas is white!
(But why?? What is the origin? Its gotta be more than just Saltines be white! There's all kinds of crackers--Wheat Thins, Ritz--and THEY ain't white! Huh?!)
Cracker is a refrence to the sounds whips make...
KILL WHITEY!!! Lol, just playin.