Grumpy is a 1930 American pre-Code drama film directed by George Cukor (in his directorial debut) and Cyril Gardner, and released by Paramount Pictures.

A Spanish-language version entitled Cascarrabias, written by Catalan writer Josep Carner Ribalta (1898–1988) and directed by Gardner, was released by Paramount the same year.

The titular character is a temperamental but lovable retired London barrister now living in the country with his granddaughter Virginia.

Ernest Heron, Virginia's beau, returns from South Africa with a valuable diamond, and that night he is attacked and the gem is stolen.

Suspicion falls upon Chamberlin Jarvis, an acquaintance of Virginia who was a houseguest at the time, and Grumpy follows him when he returns to the city, where he tries to sell the diamond to Berci.