C.H.U.D.

A rash of bizarre murders in New York City seems to point to a group of grotesquely deformed vagrants living in the sewers. A courageous policeman, a photo journalist and his girlfriend, and a nutty bum, who seems to know a lot about the creatures, band together to try and determine what the creatures are and how to stop them.

A couple of teenagers break into a secret government science lab and steal a frozen corpse for a high school prank and accidentally awaken the corpse which turns out to be a CHUD named Bud, who goes on a killing spree and making his victims also cannibalistic CHUD's and its up to the teens to stop him.