Nigga Balls HD comes from a video of a balding white man with a beard very exaggeratingly shouting out someone on Instagram named "big black nigga balls hd", followed by other Instagram accounts he shouts out in the same clip.
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.