Things Are Tough All Over (1982)

Cheech and Chong work briefly as car-wash attendants and musicians before being hired to drive a car from Chicago to Las Vegas. Unbeknownst to them, their employers (themselves in double roles) have concealed $5 million of dirty money in the upholstery. A series of adventures ensues, including the making of a porn film featuring 'The Guys' and their real-life squeezes.