Best movie "you've never seen"

I'm biased, I count this among my favorite films. I love the cameos and the social commentary that is displayed via witty satire. This cast is undoubtedly the greatest assembled for a film nearly no one has heard of. To wit:

Doc and Marty are reunited.
A generation's crush talks naughty without getting naked or degrading herself
Literally every scene has an actor of merit, most are award winners.
The take on marketing
The take on lawyers
The take on drugs

All wrapped up in a clever little road flick.