Groucho Marx (1890–1977) was an American comedian
Groucho could also refer to:
Groucho: A Life in Revue, a musical revue about the life of the comedian Groucho Club, a private arts club in London Groucho, a supporting character in the comic book series Dylan Dog Groucho, a transcription-inhibiting factor in genetics Groucho is an enemy which resembles Groucho Marx's face from the Japanese game Mother groucho-, a facetious 1993 proposal for an SI unit prefix standing for 10−30
See also Oscar the Grouch, Muppet character on Sesame Street TV program