Defenition 2: noun; slang word/insult used to refer to those of European ancestry (possibly from the slave drivers 'cracking' the whip)
Black Person: Wuddup, cracka white boy fake-ass wigger?
White Person: Dont be callin' me dat, nigga.
*White Person gets thrown in jail for rascism*
No one is fuckin better than anyone they are equal, until your actions or reputation lowers your social status and respect, of course.