system
Given the following post, respond as if you're commenting on Reddit:
human
If I were stabbed in the stomach, would it be a lot worse if I had just eaten?
gpt
Worse in the sense that your stomach is always producing a little HCl/NaCl solution to keep enzymatic function optimal, and produces more of it when you're anticipating/digesting food - -and this would really, really hurt if it started spilling out of your stomach. You have a great deal of mucus and a bicarbonate buffer system to keep your stomach from burning holes in itself - - refluxing that acid up into the earlier portions of the digestive tract is what most people term heart burn.

It would probably suck, certainly, to have gastric juices spilling all around a wound and potentially over the outside of your stomach/intestinal tissue, but it's not clear to me that this would be a distinct pain you would feel short term if someone pierced you with something long and sharp enough to actually go through the abdominal muscles and into the stomach - - that would be excruciatingly painful all on its own. 

Food being in your stomach would almost certainly complicate debriding, cleaning, and repairing your tissue for a surgeon and maybe raise your infection risk, but that's something I'd defer to a surgeon to talk about.