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1.
A type of cereal commonly eaten by white people in order to improve their stamina and jumping ability. Also is known to increase penis size, but has the sad side effect of "broke assness", or more simply the condition of having no money. First seen on Chapellels Show
Hey jake, didja get yo daily nigger o's today?

Hellz yeah you think i'mma be the only white boy can't jump?
by CaptainCrunk December 06, 2006
 
2.
A round cereal made up of ground up niggers. When you add milk its gets dirty and smells bad.
I was eatin' some NiggerO's this morning and now I got breath that smells like Africa! Fuck!
by bjzracist April 18, 2012
 
3.
another word for nigga/ negro
Jack: Was good my Nigger O
Pimpin:Chillin dawgie wassup wit that silly nigger O Sonny
by JDubbz/Young BK December 01, 2006