Little green men is the stereotypical portrayal of extraterrestrials as little humanoid creatures with green skin and sometimes with antennae on their heads. The term is also sometimes used to describe gremlins, mythical creatures known for causing problems in airplanes and mechanical devices.

The Great Gazoo, or simply Gazoo, is a fictional character from the animated series The Flintstones. He first appeared on the show on October 29, 1965. The Great Gazoo was voiced by actor Harvey Korman.