the involuntary act of shitting which usually leaves your asshole burning. this is when you have a case of the runs, and you finally make it to the toilet and your gut involuntaryly sucks in and the shit squirts out automaticly. Jus like puking but out the other end. the only difference is that u cant use your finger to induce this kind of throwing up!
man 1: Damn man that didnt take long!
man 2: Yeah I know...thats cause ma asshole is throwing up.