Alternative name for the Pork Scotch Van or half-car after a huge frozen dump was put on the roof of it. The crap thawed out overnight and was nicely baking in the sun the next day before the Scotchers emerged for their daily jaunt to buy barbecue food. Scotchy didn't spot it at first so he drove round with a turd just a few inches from his fat bald koala head.
Bloody hell what's that I can smell?
That'll be Scotchy's Shit-Wagon. He still hasn't persuaded Goofy Granny to clean it off.
Filthy old bastard.