One who is so devoted to a person, place, or thing that they spend almost every waking minute thinking about that thing, they have posters and pictures of it all over their room and/or house, and always have the latest news on it.
"John is such a fannibal about the Backstreet Boys."
"Jill is fannibalistic about alligator slippers!"
"Jill is fannibalistic about alligator slippers!"
by Teej "Godfajah" Osburnicus November 10, 2008