She's referring to Tinie Tempah's new single, "Girls Like," which features the refrain, "Tell J.K that I'm still rolling." This has little to do with anything girls actually like and more to do with Rowling's last name sounding like the drug and general fun-time phrase, "I'm rolling." Rolling/Rowling was nonplussed:
You hear that? It's the sound of Tinie Tempah's cue to prove he can go toe to toe with anyone on Harry Potter:
Good job, Tempah, because that actually makes sense! If Rowling had spent more time in Divination class, she could have foreseen her send-up on the grime scene. But J.K. does not play with that Divination nonsense:
Luckily, Tempah's spent time freestyling on the streets of London, so he knows how to craft a comeback. And he also apparently scored off the charts on his OWLs.
Ohhhh! Tempah not only takes the Divination thing in check, he's managed to get an unbelievable amount of exposure to any of the six million people who follow Rowling's handle.
But... can you use a Time Turner to go forward in time? Don't Hermione and her crew only use it to go backwards? Where does forward time-turning show up in the canon text? Ohhhh, snap! (Editor's note: Mitchell has unilaterally declared a "snap" here, when really you need a third party to decide if something is worthy of a snap.)
Maybe that technicality—pending a closer reading of The Prisoner of Azkaban, of course—is why the U.K.'s OG J.K. simply stopped responding. Or maybe it's because she's busy talking to another one of her six million fans.
Either way, future rappers looking to challenge the throne should take heed: don't send for Rowling unless you want a ton of free publicity. Which simply demands the question, when will the Devilman weigh in?