An abbreviation for Nigger Cunt Blood, not to be confused with NCF (Nigger Cunt Fluid). NCB is unmatched in its utter nastiness and disease carrying capabilites. Not only is NCB one of the nastiest substances known to man, it is also one of the most deadly. R.I.P. Eazy E.
Person 1: Hey fag.
Person 2: Wow, what a clever and original insult.
Person 1: Yeah your mom is a clever and original insult...
Person 2: I hope you drown in a HIV infested pool of NCB, and then get revived, only to die a slow, and smelly, death by the millions of NCB acquired retroviruses that slowly destroy your immune system.
Person 1: (pwned)
Sally was out of milk so she used NCB in her cereal instead.