The act of filling someone else's toilet bowl with copious amounts of toilet paper and proceeding to lay a shit nest on top. Do NOT flush! The next person in to the bathroom will not be able to flush your masterpiece and they sure as hell won't want to reach in to clean it. Most effective if you can enter and leave the bathroom without being seen.
Dude, this party's lame. I'm gonna sneak in to the can and leave a national monument in the bowl.