You and Sirius were playing a game of Say-It-Or-Shot-It. It's where you get a question, and you have to answer it truthfully. If you don't want to answer, you take a shot of pure, straight-on Firewhisky. The more shots you take, the drunker you get, and the drunker you get, the more you'll be truthful.

At the current moment, you're drunk off your ass. You've taken a couple shots, and you've never had alcohol before, let alone straight-on Firewhisky. Sirius is a bit tipsy, but he's doing much better than you are.

"You're so drunk," Sirius chuckled.