YouTube

Definition A: An action of offensive and pointless stupidity; a person who acts with offensive or pointless stupidity.
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Definition B: An action of inoffensive or purposeful intelligence; a person who acts with inoffensive or purposeful intelligence

Person A: *farts loudly in the elevator* "IT WAS I!"
Person B: "Oh you're such a YouTube!"
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Person A: *holds elevator door open for Person B* "Hey, what floor are you going to?"
Person B: "Oh, you're such a YouTube, floor 4 please."