I’d define that word as episodes that feature characters acting wildly out of sync with their usual rhythm in a way that makes no sense and does nothing for the long term growth of that character.

Almost all shows with a traditional 22-episode format have them so I don’t look too down on the better shows having a few fluff episodes a season because TV show writers have deadlines and orders from above to churn out episodes and I think the very best make the best out of a not-ideal situation.

Even shows like Seinfeld and Frasier and Parks and Rec had some episodes which seemed less than essential but they still offered fantastic entertainment even in those episodes so I’m fine with a little fluff here or there as long as it’s quality.