When you have a shit ready to exit a person's colon, but waited too long. The shit starts traveling back up the colon to start hibernation, but it is met with a
new shit ready to blow out. The turds collide in the intestine and start to overlap just like
tectonic plates.
John: "
Karl, where have you been all day?'
Karl: " I somehow
managed to pass a
tectonic Shit and not die"