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1.
ncb
slang for "not coming back"
She went on BRB, but I'm pretty sure she's NCB.
von sammit 5. Oktober 2005
 
2.
NCB
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.
EXAMPLE 1:
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)
EXAMPLE 2:
Sally was out of milk so she used NCB in her cereal instead.
von Fredifurd2 21. März 2008
 
3.
NCB
Nigger Chasing Bitch

A term usually used to describe asian girls that like to date black guys.
A couple consisting of a Black Guy and an Asian Girl.
kim:have you seen hana's boyfriend?
sara: yes he's black you know she's such a NCB
Kim: what??
sara:Nigger chasing Bitch!!}
von kristalicious 25. Januar 2011
 
4.
ncb
short form for "naughty cop boy"
von annon 12. September 2003