A Fear Gorta is a demonic spirit found in Irish mythology and folklore.
A Fear Gorta is often envisioned as a phantom of starvation that manifested as an emaciated human (usually male) who would travel the world during famine, while the creature could be warded off by giving it alms the legendary "Hungry Grass" of Ireland was said to be the creature's doing and despite its ghostly appearance it often had links to the fey.
"Hungry Grass" was a cursed patch of grass that was believed to be created by a Fear Gorta and any who stumbled across the patch of grass would be stricken with a rapid, supernatural hunger that often caused death or a perpetual state of never-ending hunger.