To gang up; as if to fight unfairly. When a group of people maliciously fight another with the advantage of more people.
Can refer to either gender and any race.
Just because she called you a whore doesn't mean you had the right to nigger-up on her with your trashyfriends and beat the hell out of her.
To perform live a traditional song (i.e. National Anthem) disregarding tradition and the history in which said song was written (See: "Carl Lewis" 1-21-93, or Marvin Gaye: 2-13-9-83). The Lewis version is a classic "can't sing at all" version while Gaye's 83' version is clearly "niggered up." Francis Scott Key's original version was not intended to be a personal showcase or an example of hip-hop.
Dammit! I hate it when the National Anthem takes 15 minutes to sing!! If they didn't Nigger up that song it would have been done13 minutes ago!!
To convey in word and demeanor, a resolute assertiveness concerning a principle, belief, conviction. or position-so as to inform the hearer that"I'm as mad as hell--and am not taking anymore of this shit!!
It's time for President Obama to "Nigger- Up" on all those people who just want to get the Black Guy out the White House!