Fecal vomiting

Fecal vomiting or antiperistalsis is a kind of emesis in which fecal matter is expelled from the intestines into the stomach, by spasmodic contractions of the gastric muscles, and then subsequently forcefully expelled from the stomach up into the esophagus and out through the mouth and sometimes nasal passages. Alternative medical terms for fecal vomiting are copremesis and stercoraceous vomiting. It was also referred to as miserere in medieval times.