Here's a hint, take it from a stoner who's eaten a fast food meal or several in his time.
Mcdonalds is shit, it fills you for fifteen minutes, you let a big fart go and you're magically hungry all of a sudden.

If you are going for fast food, go for burger king or kfc, BK fills you for a good 6-8 hours, kfc keeps you going for up to 6 hours.
( Spider Fucking Riviera got stiches for a knife wound for the first time, Thu 23 Jun 2011, 1:44, archived)