Literally, a cat that has FIV living on a back porch in Jacksonville, FL, waiting to be taken to the cat sanctuary. Used appropriately as an expletive to describe bad situations or people.
2007-08 UK basketball is an aids cat.
The guy who just broke up with me is a fucking aids cat.
The guy who, on the first date, seriously asked me "Do you wanna see it?" is an aids cat!