Sink my shit

Sink my shit
A game played by 2 or more people, each person takes a huge shit in the same toilet without flushing or wiping so that that it's just shit and no paper and when you flush, the toilet just fills up creating a massive floater or 'bung' thus sinking my shit and rendering the toilet useless.

Sam-"Yo man, you wanna play sink my shit?"
Jim-"Yes man"