"Dammit! my (insert cool car here) is in the shop. Guess I'll mob the hooptie to work."
"Well, it might be a hooptie, but hey, it's got it's own class of demolition derby."
The archetypetal hooptie is a beaten 70's-model American car with dark tinting and flashy (if not actually expensive) rims, but may include anything from an iced out Geo to a dilapidated van or Honda.
Compare with beater; contrast with whip.
Features include: a plume of blue oil-soaked smoke coming from the exhaust - general odor of beer vomit and french fries - a Kraco stereo with a 10 year old Nirvana cassette stuck in the player - flat white, flat blue and Bondo red in color.
2. Any Saturn automobile ever sold.