butt-splash 

A splash of water from a toilet following a good-sized shit

sitting on the toilet this morning i had a dump that created a toilet-bowl sized tsunami that threw a butt-splash at my arse

butt-splash by Nico Pelletier August 3, 2007

Two Pound Butt Splasher

When you drop out a turd so big it splashes the toilet water up onto your ass.

"Man after I ate all that Mexican the next day I dropped out a two pound butt splasher."

Two Pound Butt Splasher by Robby K. December 20, 2005

Butt cheek slasher 

A person who rubs Dylan's butt cheeks until... Well. Until they get tired of it.

Wow. It's you! The Butt Cheek Slasher? Run away!

Butt cheek slasher by StangBang! October 17, 2017

buttsplash 

the sprinkling of water you get on your butt when you are sitting on the toilet while it is flushing.

Mostly women get a buttslpash while on the toilet if they flush and dont get up fast enough, or if they flush first and sit down too soon.
Men may get a buttsplash from a crash-landed turd.

buttsplash by ruralbetter March 19, 2010