Fellini Satyricon
Based on Petronius' work "Satyricon," this utterly batshit hallucination of Roman ultra-decadence with a bizarre, meandering plot that follows two young men trying to win/regain the affections of a particularly creepy pale teenage boy. There's lots of Fellini trademarks - grotesques, nonsensical actions and frantic dialogue, creepy actors staring into the camera for no reason, bad wigs, etc. Add to that orgies, a minotaur, a woman that apparently spouts fire from her nethers, and you've got a sprawling mess of surreal craziness that I'd LOVE to hear Mike, Kevin and Bill weigh in on - if they can stand the perversity!
Then again I saw this when I was 16, so I'm sure three grown men can stomach it!
Just check out the trailer and see for yourself:
https://www.youtube.com/watch?v=RrBUdUYL71s