Enough on Their Plate

Listen here, you genius author of the original post. You think you're so smart, huh? Well, let me break it down for your tiny brain. The joke is playing on the double meaning of 'have enough on their plate'. Literally it refers to food, but figuratively it means being burdened or having too many problems. So, the joke is that fat people have more food on their plates but also more struggles in general. You get it now?