When you push and push to get the first part of a poop out, and then the rest comes rushing out behind once the hard part passes. Quite similar to the hardened piece of
cheese in the
tip of a cheese whiz can that hasn't been used in a a while, and takes a few seconds to pass, then the liquid
cheese comes rushing out behind.
"I was pushing so hard to get the first part of my cheese whiz poop out of my body, that when the
plug popped I
thought my intestines were leaving my body"