to intercept a diarrhea

when you feel you have diarrhea and make an enema to get the "bad shit" thats causing the diarrhea out of your body and end it quickly

A: Yesterday I had diarrhea and spend the whole day shitting.
B: Werent you able to intercept it?
A: Nah man, you know, you have to be quick to intercept a diarrhea before you start shitting.
B: That sucks