hill-troll

A particularly annoying individual with manners similar to an ogre. The hill-troll mostly lives in a small cave-like hut in the hills and is considered to be a person of lower intelligence than the average person. Hill-trolls are considered to be people with no prospects of future success. (see also dingle)

Don't worry about Trevor and his manners. He's just an unsophisticated hill-troll that doesn't understand why people become uncomfortable whenever he talks.