The most vile, disgusting, and vulgar film of all time:The Aristocrats

I couldn't resist and had to rent The Aristocrats.
This is a documentary about a joke.
It is a joke only told by comedians to other comedians. The outline of the joke is that a man goes into an agent's office and says he has a family act. He then either acts out or describes the most obscene acts possible. The stunned agent says, "And what do you call yourselves?" and the man answers, "The Aristocrats."

My buddy Dana Gould is in it, too.
Definitely worth seeing if you like the dirtiest form of humor ever performed on camera!