Taking a dump on a toilet lid, then lifting up the lid as fast as possible to catapult the shit through the air and around the bathroom.
Dude that Chinese ninja took a shatapult in the downstairs bathroom last week, there was shit all over the place.
by Stebe Retfield February 03, 2006
1 more definition
This is when you are ice skating nude and you hit a perfect triple axle. Either while jumping up or during the post-landing spin, you pinch one off. The centrifugal force on your turd pulls it flying out at a force to be reckoned with.
I will shatapult on you.
by BigLud July 20, 2014