Nigging

Shagging a black nigger

"Sally is nigging her right now"

Nerd

A nerd is someone who is smarter than you. Usually they use the knowledge to be smart asses. Over that they grow to actually be successful.

Bully: Your a fucking nerd ass ding dong man
Nerd: Wrong use of your its you're and cussing is so unoriginal. Also where's you punctuation?
Bully: You're a nerd man!
Nerd: That's better!