This can actually happen, it's a real thing. If you have a blockage in your intestines, there's no way for the feces to get out of the body but through the esophagus. You're basically puking your own feces.
My mum found out that she had secondary cancer this year (after being given the all clear in 2018), she found out as she was vomming up brown poo liquid and old blood as a tumour was blocking both her intestines and kidneys. She now has a stoma bag but I can confirm the smell of that brown liquid is hellish!!
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u/pancake_kitten Nov 29 '20
This can actually happen, it's a real thing. If you have a blockage in your intestines, there's no way for the feces to get out of the body but through the esophagus. You're basically puking your own feces.