So this what we doing now?
A way of showing disappointment or disbelief in someone, or pointing out someone's stupidity or nastiness; another way of saying "Are you serious?" or "You not deadass right now".
Person 1: "Yooooooo lemme tell you! My cousin finally let me smash bruh!"
Person 2: "So this what we doing now?"
Person 2: "So this what we doing now?"