A necessarily late night quest to the closest/farthest 7-11. At least 3 of the four derf meisters must be involved.
For every extra 7-11 hit up, a prefix must be added, i.e. double, triple, double-double, etc.
Douchebag: Wait, what's a derf run?
Derfmeister: WHAT'S A DERF RUN? Why, it's the most wonderful magical thing of all. And it only happens once a year, every week!