The Garbage Pail Kids Movie

I can make a solid case on it being the worst I've seen because at least other movies can turn into "So bad it's good" or "So bad it's hilariously bad" or have multiple features that generate enjoyment. This movie had Anthony Newley. That's it. It encompasses the worst of the 80s, complete with unlikable characters, repulsive aliens who move their mouths with minimal effort, repetitive gross-out gags, the antithesis of warmth, joy, empathy or entertainment and one of the worst original songs spawned by rejects of Satan's orchestra.