The Weed Eaters

This movie is "The Weed Eaters" and story line : Jules is on a New Year's Eve trip with her new boyfriend and his two stoner friends in the wops of North Canterbury when they stumble across a long-abandoned stash in an old shed. After a quick session and an accidental murder, the marijuana turns them into enthusiastic cannibals. To cover the evidence of their murder, they decide to keep toking so they can devour the body. What will happen when the meat runs out? Who will be the next victim?.