The act of a self flushing toilet automatically flushing itself before you are done with your bowel movement thus causing your own excriment to splash upwards in a bidet-esque fashion and therefore landing on your backside. Usually experienced in a public restroom.
I was taking a shit, I leaned forward to grab some toilet paper to wipe my ass. Then al of a sudden SWOOSH, Cappuccino Bidet!
by The DJNYC April 08, 2010