Someone who is always craving ham, to the point when they stop in the middle of a sentence and say "I have a craving for ham". Also these people use it to break the ice of a conversation, beginning the chat with something about how much they want ham.
Sorcha: (opening door) "Hey, Remy, how you doing?"
Remy: (walking straight past Sorcha, straight to the fridge) "Have you got any ham?"
Sorcha: "Woah, Remy, you're such a Ham Fiend"