A word used by black people with intent to offend those of caucasian descent. To black people, this word embodies the equivalent severity of the word nigger. If a black person refers to a white person as a "white boy" however, society sees nothing wrong with this. If a white person refers to a black person as a nigger, society sees him as a racist. This unwritten rule probably exists because of the historical significance carried by the word nigger, but this is unfair nonetheless.
J-Dawg: Fuck you white boy!
Clarence: Fuck off nigger! Back of the bus!
J-Dawg: Yo imma cawl tha 5-0 on this muthafuckin craka's ass.