Facial expression adopted by scorned women. So called due to the (*) shape created by the lips resembling a cats sphincter.
Dave doesn't come to the pub any more - I heard his wife gives him the 'Cats Arse'if he does.
by Antony Butnut March 18, 2004
1 more definition
Otherwise known as 'a good thing'
That episode of "The Office" was the Cat's Arse
by Darren Jonusas January 20, 2005