When you have stringy poop that doesn't disconnect when you take a shit leaving part of the shit dangling from your anus.
Dude I took a huge dump last night but it didn't cut. Man, I was totally bungee dumping.
When someone eats some sort of string such that when one takes a dump the shit is formed on the thread of string, and when exiting the anus performs a bungee jump-like action in the toilet bowl.
Hey dude I was watching the fishes in the aquarium and i ate a string and my shit was totally bungee dumping!