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Adjective: One-eighth Negro. 1/8th of one's decent being of African or negro origin. 7/8ths not black.
"She has partially nappy hair; she must be octanigro."

"My great-great grandmother on my father's side was black. I'm octanigro."

"The man's always puttin' me down just because I'm octanigro"
by Caroline thanks to Amy Hall February 09, 2008