If anyone knows about trolls, it's Harry Potter author J.K. Rowling.
But on Saturday, the troll Rowling dealt with wasn't guarding the Sorcerer's Stone. Instead, it was your run-of-the-mill Internet hater who took a cheap shot at Serena Williams shortly after she won her sixth Wimbledon title — her fourth Grand Slam in a row and her 21st Slam in total.
"Ironic the main reason for her success is that she's built like a man," the Twitter user wrote.
Rowling quickly shot back, making sure her reply was visible to all 4.9 million of her followers, saying: "Yeah, my husband looks just like this in a dress. You're an idiot." The author attached two photos of Williams absolutely rocking a tight red dress.
Game, set, match, Rowling.