What is Fannibal?
1.
Someone who eats a lot of pussy (British) or ass (American) It's a combination of
UK: Mike eats more pussy than cervical cancer, he's a real fannibal!
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2.
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!"
See