look up any word, like ratchet:
 
1.
An action or behavior found rude, or annoying.
"The troll got all nissy with me so I banned him."
by Bronynonymous July 29, 2012
 
2.
Of or Pertaning to the ghettoist gangsta G' in this side of {Ashland}

Example: Nissy is so ghetto,
Her living room IS her kitchen =]

Q: Nissy, What are you doing today?
A: YO MOMMA
Nissy, is my ghetto g.
by Lizzuke June 01, 2006