Cannibalistic, humanoid, undergroud, dweller. C'mon, I know there are some horror and sci-fi b flick aficionados out there. It's terrible, awful, horrible, & cheesy... I loved it! It tapped into all our fears from the cold war, & nuclear power.. Total B flick, quite on purpose. Came out in 1984. Watched it recently, & just laughed my ass off.
Here's a good site for it, if you pan down there are funny pics, & oooh check out the video clip featuring a C.H.U.D. Hahaha! http://www.badmovies.org/movies/chud/