Poo-dini

When a poo's Velocity is so great, it falls into the toilet and slips around the piping of the toilet and disappears. After finishing, and before flushing the toilet you realize the poo has vanished et voila! It's done a poo-dini!

Rob "hey man how was your poo?"

Steve "I dunno man, By the time I looked, it was gone, it did a poo-dini on me!"

Rob "Spewin'!, bet it was a good one..."