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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
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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Like or similar to Neo.
*dodges a bullet* Woah! Totally Neosis man!
Damn you and your neosis!
by Didget September 10, 2005
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