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Harry Potter author J.K. Rowling shut down a troll on Twitter Wednesday evening. "Shutting down a troll" is not a magical maneuver from the Harry Potter universe, but rather putting a Twitter hater in their place when they say something hurtful. And Rowling is known for being quite good at it.

Twitter user Kevin Williamson said this in response to another tweet about Rowling:

"Radge" is British slang for a crazy person. They also call fries "chips" and elevators "lifts." Rowling responded to the hater by parodying lyrics to the rap song "Ridin'" by Chamillionaire:

Sources: Twitter: J.K. Rowling