Slang in some South American countries for a black person, specifically a small black person, but used in many areas as a derogative term. Diminutive of Nigro, meaning nigga or negro in these respective areas.
Most accurate literal translation would be "niglet", though the word is used more like the word nigger, maybe not the same as nigga.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi