Devil’s bidet 

Water that splashes up onto your legs and, occasionally, into your anus when dropping a turd into a toilet.

“Hey man, you’ve got a wet spot on the back of your leg.”

“Devil’s bidet must have hit me.”

Devil’s bidet by Chase Fisher June 15, 2018

Devils Bidet 

When you are taking a shit and the water splashes back at your brown eye with the aim of a heat seeking missile.

John had to go home and shower after his morning dump turned into a devils bidet.

Devils Bidet by Dunak November 26, 2013