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Cliche No. 6: Other holidays
We're sure whomever did it first was being really original. But it has now become cliche to be anti-Christmas or combining Christmas with another holiday, in a very aren't-we-so-clever kind of way. We applaud Ross wanting to teach his son about Hanukkah ("Friends"). We think it got weird when he couldn't figure out what to wear and came as the Holiday Armadillo.
Other offenders: "The O.C.," "Seinfeld", "South Park"