Turd Shower
To lie on your back with your knees up to your chest. After being given a hefty enema, push with all your strength spraying you colon contents upward.
Jack: Last night, I gave myself a Turd Shower!
Nick: Oh yea, how was it?
Jack: Very runny!
Nick: HAHAHAHA!!!
Nick: Oh yea, how was it?
Jack: Very runny!
Nick: HAHAHAHA!!!