Around thirty minutes ago, Meek Mill tweeted out one letter: Z. The twittersphere is going crazy with it, retweeting, analyzing, and poking fun at it. While we're still not sure if it was an accidental tweet, a response to Drake's diss, or an affirmation that he's tired, Meek's taken to Instagram to deliver a more direct message.

The Philly rapper, who is currently on "The Pinkprint" tour, is on his way to Montreal to perform at tonight's stop. Right now he says he's enduring a five-hour drive to the city, so that's plenty of time to come up with bars in response to Drake's "Back to Back" (or "Charged Up," you pick). He wrote, "Right now I'm on the road still cashing out ..... Ima b in the studio soon.... 5hr ride to Montreal ...," adding a winky face at the end. The winky face seems to confirm that the forthcoming studio session will be to record his response to Drake, but we can never be too sure.

Stay tuned.