look up any word, like tribbing:
 
1.
A niftyier way of saying cool, that is the shit, or this is wonderful. It is also used to say that someone or something is really clever or intelligent.
the guys at holybullshit.com are the cats ass.
by James Bourne February 20, 2004
 
2.
Being genrally awesome, something that is really, really sweet.

there are also varitions such as The Cat's Meow
person A: "Hey man look at this sweet new game"

person B: "WOW! that's the cat's ass!"
by FathaFunka June 29, 2010
 
3.
something to be fucked by Ganj4 on a weekly basis when he isn't getting any <3
Ganj4 Mmmmmmmmm, I'm gonna dip my meat in the cats ass
by Sway March 26, 2004