A troll is a supernatural being in Norse mythology and Scandinavian folklore.
In origin, 'Troll' may have been a negative synonym for a 'jötunn'; a being in Norse mythology.
In Old Norse sources, beings described as trolls dwell in isolated rocks, mountains, or caves, live together in small family units, and are rarely helpful to human beings.
Later, in Scandinavian folklore, trolls became beings in their own right, where they live far from human habitation, are not Christianized, and are considered dangerous to human beings. Depending on the region from which accounts of trolls stem, their appearance varies greatly; trolls may be ugly and slow-witted or look and behave exactly like human beings, with no particularly grotesque characteristic about them. Reference: Wikipedia
I came across this guy in the basement of a restaurant.
It looked like he'd been painting.