* AcceptableTargets
** A little person is mocked and threatened in ''At The Circus''. It works because it makes Groucho seem [[UnsympatheticComedyProtagonist cowardly and weak]] instead of cruel.
** Upper class people don't generally come up with the longer end of the stick either. Of course, a lot of that comes from the Depression Era roots of the act; Film/TheThreeStooges and other comedy troupes of the time did the same. But then again, few people get treated well by the characters the Marxes play.
* BaseBreaker: One of the the most hotly debated topics among fans is whether or not Harpo sang in the "Sweet Adaline" bit at the opening of ''Monkey Business.''
* CoveredUp: A rare non-song example: ''ANightAtTheOpera'' and ''ADayAtTheRaces'' are better known as Music/{{Queen}} albums than as Marx Brothers movies.
* FandomRivalry: Often with the fans of Film/TheThreeStooges.
* OnceAcceptableTargets
** Chico's portrayal of an Italian immigrant, Harpo's original "Irish bruiser" character from his vaudeville days, etc. Hey, it was the '30s!
** There's the scene in ''The Big Store'' where they have black actors literally picking their cotton in-store.
* VanillaProtagonist: Zeppo was invariably overshadowed by his [[LargeHam much hammier]] brothers. Without him, they wouldn't look so hammy by contrast.
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