I stumbled upon the 1987 horror-comedy late night on NetFlix. To put it simply, it is one of the greatest most awful things I've ever seen. Homeless people exploding, gang rape, murder, necrophilia, Vietnam flashbacks, and an obscure Mob sub plot are just a few of the things that make this film amazing. For fuck's sake, a character who might have 10 mins of screen time appears in the final scene and then narrates what just happened to him with a song through the credit reel.
I have a feeling The Big Year will be on your list soon too based on the plot alone.