This is a modified version of a blumpie. Except while you're receiving oral pleasure the person performing oral will also be laid beneath you while you remain in a squatting like position and let both loads on to the person who will be a very angry one indeed when you fail to mention you wanted to take a shit on them. Making them your angry toilet :D

When you eat dirt for the first time and leave your family to build a shack in the woods

when you've been holding it in for way too long. then you go to some shitty place, like a mcdonalds, and rush to the toilet. once on the toilet you squeeze really hard causing a shotgun effect of shit in the toilet.