What Makes Up the Name: sex + exile

So now your roommate gets back at you with the old scrunchie on the doorknob trick to let you know you're sexiled from your apartment. But it's a big apartment. What could he be doing in there? You did ruin his chair, but still. And why does he have so many scrunchies? It's best you just go to the laundromat for a few hours and try not to think about it. You owe him one.

Origin: It began in college dorms definitely before 2000, but exactly when and where, who knows.