unc-hole

That one uncle who is always doing crazy things with their nieces or nephews that ends with them getting hurt or scaring the piss out of them. Everyone has one.

Sister: Is my daughter out playing with her Unc-Hole?
Mother: Nope, she just came home crying because her Unc-Hole scared the piss out of her again.
Sister: He's way to crazy to be playing with her, she's only 4.