If you focused on high-octane foods, like Deep Fried Oreos which contain 156 calories in a single cookie, you could, realistically, space out eating 40 cookies -- the equivalent of 6,000 calories -- throughout the day. Assuming, of course, your goal is to eat 6k calories of the most unhealthy food you could get your hands on. Wash it down with regular coke, and you could, reasonably, hit maybe even 7k.  Fun-fact: Boogie2988's caloric maintenance, assuming he is 5'10, is around 4,200 calories daily. The fact that he gains pounds weekly means that he routinely eats over 6,000 calories.