I am told that there is actually a strain called Cat Piss. It is also very similar to the super skunk smells. It is usually really good weed but hard to hide.

I went to a friends house who had a stash of cat piss/skunk KGB. You could smell the weed at the front door. When I went inside I saw that he had the weed stashed in several bags in a drawer in a back room. The entire house smelled like an open bag of killer weed. I was rolling a joint when my wife walked in. She took one smell and said the cat has pissed in here. But it was just the weed.