C.H.U.D. is a 1984 American science fiction horror film directed by Douglas Cheek, produced by Andrew Bonime, and starring John Heard, Daniel Stern, and Christopher Curry in his film debut. The plot concerns a New York City police officer and a homeless shelter manager who team up to investigate a series of disappearances, and discover that the missing people have been killed by humanoid monsters that live in the sewers.

The title of the movie is an abbreviation that stands for Cannibalistic Humanoid Underground Dwellers.

The film was released in North America on August 31, 1984 and grossed $4.7 million. It was followed in 1989 by a sequel titled C.H.U.D. II: Bud the C.H.U.D..