A Big Booty Black Nigga is a very flamboyant homosexual man.
For one to be considered a BBBN you have to have an abnormal sized ASS as well as an abnormal sized penis (Extremely large or Extremely small). One must also be extremely buff. Race is not a limiting factor as to if one can be considered a BBBN.
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