Some one who plays a Online game and excludes everything else. Often used to describe when some one has a lot of time to spend in a online game.
Came from a article in a newspaper on Everquest. The player they interviewed played so much Everquest he forgot to change his cats littler box, leading the reported to comment his house smelled like "a cats ass".

PC Gamer says "Apparently, there's a word in the MMO community called 'catass' to describe someone whose online addiction has caused their domestic and personal hygiene to degenerate to such a degree that their entire house begins to smell like an enormous cat-litter box."

Jumping onto high surfaces quickly, and silently landing on your ass. The use of arms for balance is strictly prohibited.

when someone tkaes a drag of your cigarette and leaves it all gooey and wet!

Sexual pleasure from spraying catnip on your ass and having the cats go at it.

The uncomfortable feeling associated with a sweaty, uncomfortable, and puckered asshole. Originated from the idea of how a cat's ass looks and might feel.

I'm 50 years old, when I and my friends started smoking as 10,11,12...year olds,we would share one smoke, and we always cursed the guy who would wet the filter, hence the term "catass"

'