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The fear of using vending machines in public because you're worried that the item will get stuck and people will laugh at you.
Harry: "I fancy a Mars Bar, would you get me one from that vending machine?"

Roger: "Nah man, there's loads of people around and i'll look like a right dickhead if it gets stuck"

Harry: "Damn man, you've got nondropophobia"
by EddceLLent January 25, 2012