The act of having ones penis wrapped in chains that are tied to a buddies muddin truck. The driver then proceeds to throttle on and off in a way that the truck moves to and fro whilst pleasing the chained individual.
"Hey Jimbo, hook these chains to your big 'ol super duty hitch and gimme a Hillbilly Dick Tug for me wouldja?"
by SgtDanger October 2, 2011