Let's do the math. If a normal human male weights 140 pounds (roughly 70Kg) and he weights 595Kg we can safely assume he has 525Kg of fat in him. If a gram of fat has roughly 9 calories, then he has 525,000 times 9 calories or 5,355,000 calories in his fat deposits. That is five million three hundred and fifty five thousand calories. If a taco has roughly 226 calories...  This fat bastard ate around 23,695 tacos.  I'm assuming he doesn't have any calorie expenditure since he just lies there day after day. If you want to get the staggering number of tacos eaten to get that fucking fat over time, you need a suitable differential equation and I am too lazy to do calculus.