An action or behavior found rude, or annoying.
"The troll got all nissy with me so I banned him."
by Bronynonymous July 29, 2012
Get the Nissy mug.
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 2, 2006
Get the Nissy mug.
A fictional omniscient quantum computer featured in the novel NISSY: The Artificial Intelligence Experiment We Feared. Created by Dr. Jason Godwin, Nissy has the power to see into the future and inflict pain on those humans it dislikes. Found in the book: ISBN 197819613X.
Nissy, a behemoth of unfathomable technology hung from a thick umbilical sheath and towered over him occupying much of the room.
by NissoidNsddsssss$@ March 12, 2018
Get the Nissy mug.
A person ages 12-45 that like WWE Wrestling and will think that it is real no matter what you say. The adjective "Niss" May also be used by a

Nissy Boy that he/She may think is cool.
Oh Niss!

That Action figure is soo Nissy!

That man sure does like WWE Wrestling...He must be a Nissy Boy.
by NissyBoy May 13, 2013
Get the Nissy Boy mug.