What is lip incompetence?

If you’ve seen “Napoleon Dynamite,” I’m sure you can recall the title character’s open-mouthed appearance in the quiet moments before he uttered popular phrases like, “Gosh!” or “Tina, you fat lard, come get some dinner!” The term that describes the open-mouthed condition of John Heder, the actor who played Napoleon Dynamite, is “lip incompetence.” Text:…

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