Stuffing

While it varies from person to person, according to what I looked up said the maximum amount of food that you can eat in one sitting is 3-4 litres(or 8.8185 pounds) of food. At that point, your body tells you to stop, and if you try to eat more than that, you end up vomiting.

Again, this varies from person to person, and there have been people who can eat 10-12 pounds, but 20? Sadly, it's a stretch that anyone could pull that off.

But still, one can dream...

(also, if you need confirmation I'll leave you a link to a video that'll help confirm it)

This might be a little off-putting considering we're on a fetish site, but I believe the highest number I saw was around 18 pounds...but the person ended up dying from their stomach kinda bursting >.>. So yeah, the human body can take a lot. Most people will end up vomiting/getting sick before that point though.