When you've had such a terrible bout with some extremely explosive diarrhea. The kind in which no toilet paper or wet wipes could do you an ounce of help.

1. You head to the shower and turn the faucet on. Prop yourself underneath with your legs up on the wall and let the forceful water from the faucet completely douse your ass crack and nether regions for a complete cleansing.
2. You turn your back to the sink, turn the faucet on and continually splash the water on your ass crack and nether regions completely cleansing any shrapnel or remnants of the disaster.
(Hand soap can be used in either scenario for extra cleansing)

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

The exact polar opposite of a bidet; instead of being sprayed with a stream of fresh water from your toilet, you spray your toilet with a high-pressure stream of hot diarrhea.

The exact polar opposite of a bidet; instead of being sprayed with a stream of fresh water from your toilet, you spray your toilet with a high-pressure stream of hot diarrhea.

When a man is urinating in a toilet and uses his stream of piss to pressure wash streaks of poop off the bowl.