system
A chat on subreddit /r/me_irl
human
My first thought is old accumulated vomit, I can see him sleeping there, then waking up needing to puke and just leaning over the edge. Wherever he’s drinking could account for the colour and the splatter pattern looks about right for puke.
gpt
Looks exactly the colour of Newcastle Brown or Guinness. When I was on the heavy stuff as a student, I’d bring up some dark brown vom. Was disgusting. Or it could be blood. Guy has no doubt rotted his guts away.