Definition of "in-jokes" [in-jokes]

• Plural form of in-joke. (noun)

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• "I've watched it 3 or 4 times now and I pick up more easter eggs and in-jokes each time."
• "As the story plays out, viewers can expect more baddies to pop up, more blood to be spilled and maybe even a few in-jokes: Davis, a friend of Vampire Diaries executive producer Kevin Williamson, hints that Mystic Falls fans may get a laugh out of the second episode's lacrosse game."
• "(There are in-jokes around here about moldy lemons.)"