When a girl has a hairy vagina, and it is in the between stage where the hair is very prickly. A catopussy shares many characteristics with both the cactus and the pussy
(a slang term for vagina), hence the name cactopussy.
I was going to hook up with that girl, but then i realized that she had a cactopussy.
Damn, that girl has one nasty cactopussy.