Turd-boiler
Turd-boiler refers to a car that is of advanced age and runs like shit. It doesn't run smoothly, hiccupping along and spewing clouds of noxious fumes as it labors along. Also, it is an embarrassment to be seen in, either owning it or riding in it.
Dude, did you the car Dave was driving, that thing is a turd-boiler?!!