poop inertia
The feeling right before you are about to take a rather large poop(s).
Mom: “Jimmy?”
Jimmy: “I’ll be out in a second!!”
Jimmy (quietly): man, I can feel the poop inertia building up right now! I- *ker-plunk*
Jimmy: “I’ll be out in a second!!”
Jimmy (quietly): man, I can feel the poop inertia building up right now! I- *ker-plunk*