twizzle rod

A person who accomplishes feats of idiocy with little or no effort. Encounters with people afflicted by this condition may experience brief moments of confusion followed by frustration, culminating in an extended period of laughter. Biologists believe an afflicted human can, at will, deactivate the brain's frontal lobe.

Batman: "Robin, hurry climb up here and help me fight off these goons."
Robin: "Ok Batman...but how do I get up there?"
Batman: "Use the grapple on your utility belt. HURRY!"
Robin: "I decided to leave it at home today. I mean, who knew we would be fighting goons."
Batman: "...You are such a twizzle rod at times."