An insult, typically used when angry. The word, despite the word 'nigger', has no racist connotation to it, and can be used when insulting a member of any race.
The ultimate insult, most commonly targeted at an annoying sibling or tradesman that comes to your house to do his job. There is no comeback to this, you automatically lose.
J: A can you do my makeup for my New Years party.
R: no she will mess it up remember what happened last time?
A: R you are such a butthanger.
R: :o