Scottish janitor/groundskeeper of Springfield Elementary School, with with thick accent and bushy eyebrows. Famous for tearing his shirt exposing ripped, muscular torso. Lives in a shack on the school grounds, drives a tractor, often insults people he is gpeaking to.
Groundskeeper Willie: Have you got wax in your beester? I cannot fit into that wee vent, you croquet playing mint muncher.
Principal Skinner: Grease yourself up and get in there you... gruff speaking work slacker.
Groundskeeper Willie: Ooooh, good comeback.