dementor

plural dementors

1. An evil and fearsome creature.

   […] it was protection against the anorexic dementor standing in front of me.

   2008, The Godmother, Carrie Adams, page 242

   2 more examples

   […] and by which a certain Rabbi, who was once annoyed by a demon that came to him in the shape of a woman, got rid of his dementor.

   1850, A pilgrimage to the land of my fathers, page 423

   Diana needed to reconcile the Alric of now who pressed warm kisses to her temple, who touched her with such gentleness and showed her that he would protect her with his life, with the rage-filled dementor of her nightmares, the Alric she feared was still under the surface.

   2009, Dark Immortal, J.K. Coi, page 172