"A van, usually mid 80s, complete with a hideous mural on the side, carpet, a nasty bed, and a very geeky driver. May have a bumpersicker that states. "If this van is a rockin', don't come a knockin."
Joe : "Dude I got a new fornacatorium last weekend." Dave: "Dude, that's just some crappy old van with an ugly painting on the side."