A butcher was just having a date with his girlfriend until he cause some problems with a Taxi driver then he kills him and his girlfriend, he is going over the brink of insanity. He now goes on a killing spree creating some serious crimes and stuffing some parts of the bodies into the meat factory where it can be processed into what we eat.
Despite the title "Cannibal Man", it's not really about the man being a cannibal but it's really a psychological horror drama and a character study about a man who's been driven to the edge of his insanity. There is some shocking graphic murders which made this movie banned in other countries, the film is a sick and twisted look at a psychopath's mind with good acting and is very dark.
Also recommended: "Maniac" ( 1980), "The Texas Chainsaw Massacre Series & 2003 remake", "Caligula", "Henry: Portrait of a Serial Killer", "High Tension", "American Psycho", "Driller Killer", "The New York Ripper", "Wolf Creek", "Eaten Alive! ( 1980)", "Cannibal Ferox", and "Jungle Holocaust" ( a.k.a. Last Cannibal World).