A fork of Rural Dictionary
That little drop that bounces up and hits you in your brown eye
While taking a #2 that cold back splash you feel that makes you tighten up.
A back splash is when you're taking a dump, and the crap makes a splash and hits you in the anus.
Usually very cold water unless you've peed in it and warmed it up.
"Damn that shit back splashed my anus!" -Someone 2016
The water that hits your ass after a medium to large piece of shit breaks the surface of the toilet water, thus creating a splash effect.
My ass was wet after that large shit i took because of the amount of Back-Splash that came after it.
When you have diarrhea that's so violent that the water in the toilet bowl erupts and hits your butt.
My diarrhea was so bad that "splash back" happened.