bog devil
A disgusting trolip of a human being, usually seen sitting alone at a bar waiting to pounce on unexpecting prey. Usually fat, ugly and greasy in appearance. Resembles a gremlin or that weird fat guy you see at a local mens mission.
"Guy, that fuckin' dude Matt was sitting by himself in the corner of the bar for an hour. He only came over here to sit with us when we ordered food. What a fuckin' bog devil."