Someone who says you have the cat usually says feed it, clean it, or bathe it. Usually someones that's being a douche. Someone who has the fat cat is diliked and usually never scores with a woman. Usually said as "THE CAT" Also see "Brian J." the first victim of THE FAT CAT.
somone who has the cat getting dome-"Let the paws of the cat play in your mouth and floss your teeth."
"Thats no fair his fat cat was telling him all the answers"
"The fat cat got scared by the anaconda and fleed into the wall."
"feed the cat"
"geeze your cat smells up the whole damn room. CLEAN IT!"