I don't really think this is a bad movie, just absolutely insane. Here's the premise from IMDB:
In a post apocalyptic future, two rival gangs fight for control of Frazier Park which for all intensive purposes is the remaining inhabited world. Gangs settle disputes for leadership by playing "Beat Beat Revelation", a deadly version of a popular dance video game. The power of the land has shifted leaving the local alcoholics to become meth addicts and worse. Can J-tro overcome the obstacles necessary to redeem Frazier Park? competitive dance-fight video game "Beat-Beat Revolution."
So it's pretty much what all those 80s dance and gang movies thought the 90s would be like. Moon boots, bandanas, excessive use of the n-word (which in the movie stands for "Never Ignorant at Getting Goals Accomplished"), and some of the strangest dialogue I've heard. All with a budget of only $60,000.