This is an interesting term! It refers to a person who has delusions that they are a form of animal or that they have changed into an animal or even having any relations with any form of animal.
Guy #1: "Yo bro! Last night that hedgehog was banging like a biscuit!"
Guy #2: "enjoy the way it tasted then, yeah bro?"
Guy #1: "Whatta you think?" *WINK*
-ZOANTHROPY-