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1.
A medical condition when your ego inflates and you start to believe you're better than everyone else.

Taken from the term Neon, a person whom has had Neosis since birth.
"Bad news guys, I've come down with a case of Neosis. I'm just so glad I'm better than everyone else with Neosis."
by Strafeous October 30, 2011

Words related to Neosis

egotistical john lundie medical neon sickness
 
2.
Like or similar to Neo.
*dodges a bullet* Woah! Totally Neosis man!
Damn you and your neosis!
by Didget September 10, 2005