diarromit
Diarromit describes the combination of two horrific stomach ailments, diarrhea and vomit.  Following an exceptionally foul-smelling bowel movement, one is so nauseated by the stench that she has no choice but to immediately vomit.  

One who has just experienced diarromit often has to switch back and forth between sitting on the toilet and standing to turn around and vomit.  In unfortunate cases, the mix of diarromit in the toilet water may splash back up on the person's face, further prolonging the cycle.
After eating that Polish hot dog from the cafe in the casino lobby, I got so sick that I was stuck in the bathroom with diarromit for half an hour.