This word refers to uncontrolable bowels while involved in a activity such as lifting , playing an instrument , or having sex. It refers to the loss of control of the bowels and the spray of fecal matter allover a room or person.
Examp. #1 I had him bent over and was about to shove it in his anus and he let go a schimmelfig allover me and the nightstand and the lamp. It took hours to clean up.
Examp. #2 He was playing the Tuba and when he hit the high note he Schimmelfigged allover himself.