Top Definition
1) A combination of Nicholas and Fantastic.
2) A word used by Nicholas Tetreault and his fans.
3) Used to described something better than awesome.
4) When you can not think of a word besides awesome.
1) Dude that movie was Nicktastic!

2) Thanks for supporting Nicholas Tetreault. You are all NICKTASTIC!!

3) Did you see the youtube video that Nicholas Tetreault posted? It was totally Nicktastic!
by JustmeAmandaG September 03, 2010
Adjective used to describe the awesomely mean coworker that picks on all the other coworkers but at the same time makes them laugh boosting moral in the workplace.
Nick is nicktastic but we all still respect and love him.
by Keeka Ricardo December 16, 2015
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