A white person, usually ignorant and/or racist, for whom the racial slur cracker - while capturing the essence of the individual's personality - does not quite seem to fully capture the extent of the individual's ignorant and/or racist behavior without being used twice. The word "ass" is therefore used to break up the dual usage of the term cracker - not only to emphasize the insult by adding an expletive (for example the way "punk bitch" is enhanced: "punk ass bitch"), but also because using the same word twice in a row doesn't sound right.
Often used somewhat under one's breath in disgust after having just made a point about an individual who is indeed a cracker, or the aforementioned cracker ass cracker.
white guy with a stupid grin on his face trying to sound cool: "for shizzle, my nizzle"
any black person: "mothafuckin' what??? shut yo fuckin' mouth ya little bitch! ....cracka ass cracka..."
The cracka in Cracker ass cracker (also Cracka ass cracka) is almost never pronounced cracker.
One who not knowing the code or combination to a particular slice of ass is nonetheless able to get inside the ass
Frat boy 1: "dude is so wasting his time on lulu bitch NEVER gives it up"
Frat boy 2: "not. Dude is a total ass cracker. He will be in that ass before midnight"
A white person (usually male), who comes across as "square" to black people. He has no swagger. He possesses none of the essential characteristics of someone to whom others easily relate.