* 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.''
** There are also the argument between whether or not their MGM films were any good or if they simply didn't make any good movies after leaving Paramount.
* CrossesTheLineTwice: A real life example. When the brothers were first introduced to their future straight-woman Margret Dumont at a dinner party, Chico was warned not to make any obscene comments to her. When miss Dumont entered, Chico walked over to her and said, as politely as possible, "Y'know, I'd really like to [[PrecisionFStrike fuck you]]." Her response? "[[CrowningMomentOfFunny And tonight, dear boy, you shall]]."
* 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, [[FairForItsDay 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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