Cthulhu
noun
°A gigantic fictional humanoid alien god being described with the head of an octopus and dragon wings and claws, around whom an insane cult developed.
"1926 — H.P. Lovecraft, The Call of Cthulhu"
adjective
°Pertaining to the mythos of Cthulhu and additional otherworldly beings created by H. P. Lovecraft or inspired by his writings and imitators.