[Miranda_]

Means you eat loads of food at one sitting; if you're a binge eater, you'd stuff yourself with random food, like 5 loaves of bread, til you're uncomfortably full. If you're a compulsive eater, you'd eat food you liked, but still too much. I once sat down and ate 3 Big Macs and a whole chocolate cake in one go; I couldn't even manage one Big Mac today.