Green’s Dictionary of Slang

(US campus) a vehicle, usu. a car, with a pfx.

1971		F.J. Hardy Outcasts of Foolgarah (1975) 98: ‘The pissmobile boys [sewage truckdrivers] has knocked off but all my fellas is here,’ Turdy Tom informed them.
1985		T. Wolff ‘Desert Breakdown, 1968’ in Back in the World 142: Finally a car stopped. It was a hearse [...] ‘Welcome to the stiffmobile,’ said the man [...] Bet you thought you’d be riding with a cold one’.
1990		Eble Campus Sl. Apr. 6: -mobile – vehicle. Drunkmobile, scuzmobile, etc. Drunkmobile is a car full of people who have been drinking.
1991		C. Hiaasen Native Tongue 164: It was exactly the sort of campy junkmobile that some dumb Yuppie would love.
1995		D. Lodge Therapy (1996) 36: Jane refers to it as the ‘Richmobile’.
2000		W.T. Vollmann Royal Family 644: The gangstermobile pulled up an’ fired one gunshot into our car.
2004		E. Weiner Drop Dead, My Lovely (2005) 234: Wendy Litman pulled her purring ritzmobile into the driveway.
2013		J. Stahl Bad Sex on Speed 13: Every speed-freak car you ever twitched in did have a crack in the rearview [...] All the Tweak-mobiles had cracked rearview mirrors.
2013		K. Sampson Killing Pool 62: Just the small matter of pranging his silly little stud-mobile.
2020		D. Winslow ‘Sunset’ in Broken 182: His van [...] is known in [...] as the ‘Boonemobile’.