What is Hose Ass?
Diarrhea, especially explosive diarrhea related to illness. This term originated in the South, most likely western North Carolina.
Closely related to "jet ass," a form of diarrhea often experienced in public bathroom stalls. (We've all seen the aftermath.)
"Hose ass" can also be used as an alternative form of the insult "asshole."
So, the doctor prescribed this bowel prep kit to drink before my colonoscopy, and it gave me a serious case of hose ass. My doctor, man... what a hose ass!