Trey Parker, the co-creator of South Park, wrote and directed and plays the title role.  He also recorded the song used in the credits.  It's a comedy about a Mormon missionary with a talent for martial arts, who gets ensnared in the porn industry playing a spoof superhero called Orgazmo, and then ends up fighting crime in real life, thanks to a mix of martial arts skills and a raygun that disables people by making them cum.  In some circles it's considered a classic "midnight movie".  Somehow this got rated NC-17 despite the total lack of anything explicit being shown on screen.  In fact, almost no nudity is shown except male asses.  They interpose a male ass whenever you think you're about to see female flesh.  It's like just talking about the porn industry makes it for adults only.  But wait a minute -- Boogie Nights got an R!  Did someone say the rating boards are corrupt?  Sorry, I thought I heard somebody say something.

Is it funny?  Somewhat.  It's nowhere near as funny as South Park, but few things are.  It's campy and the action (both fighting and fucking) is deliberately unrealistic, imitating the cheapest B movies, yet there's good acting sometimes.  Dian Bachar as Ben / "Choda Boy" (the inventor of the raygun) is the best thing in the film, both for silliness and for real acting.  But I didn't laugh out loud very much.

In 2003 they threw together The Book Of Orgazmo, a documentary about the making of the film.  I think it ended up being included as a DVD extra feature in a recent rerelease.