Splashback

[Tina]

When the crap drops from a distance great enough so that , when it comes in contact with the surface of the water in the toilet bowl the water, and whatever is in it, splashes and hits your ass, hence splashback

[Ernesto]

When you are taking a dump and the deployement of your piece of crap makes the toilet water splash straight up to your ass, usually in your ass-hole.

[Kit]

The water that goes up your ass when you launch a [turd] down into the toilet bowl.

[Rihanna]

When you drop a doogan in the toilet and it hits at such a force that water splashes up onto your cheeks and/or anus.

When you stand too close to a urinal whilst urinating and urine splashes back onto your shoes and/or legs.

[Becky]

when the water from a toilet or a urinal splashes up or out and wets your arse or shoes.

(metaphorical) unforeseen, unintentional, negative consequences of a persons actions.

[Cami]

A [fright] that is caused by cold [toilet water] hitting the anus after dropping off a round densely packed type of shit called a [bomber].

[Dave Paprocki]

The spritzes of urine that deflect off of toilets, [urinals] and [urinal] [cakes] and onto the person urinating, as well has his clothes and shoes.

[Jessica]

The fear of [your shit] [splashing] the [toilets] contents up on your ass.

[Sommer]

A panel behind a sink or cooker that protects the wall from splashes.

[Justin Bieber]

an area of hard material covering part of a wall, for example in a kitchen, so that the wall is protected and easy to clean if liquid falls onto it: