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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
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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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
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3
Shouted in moments that often define a great joy or something spectacular in nature.Thought to be awkwardly Canadian in origin, circa 1960s Manitoba Province, this phrase was recently brought back to life in the Midwest United States of America. As of 2018, variations of the word have been heard as far south as Memphis, Tennessee.
My hotel has a bidet! That's the cat's ass! I've never felt so fresh so clean. I am going to purchase one upon my return home.
by Bidet Dave September 06, 2018
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4
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
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