Lycanthropy is the process of transforming into a werewolf, so if you're suddenly overcome with an urge to howl at the moon, you might be in the throes of lycanthropy!
If you love werewolf stories or movies, you can be fancy and say you're a fan of lycanthropy narratives. Long ago, this word was used for a mental illnesses in which a patient truly believed themselves to be a wolf. Lycanthropy comes from a Greek root, lykanthropos, or "wolf man," from lykos, "wolf," and anthrōpos, "man."