Water shit
When you go take a shit, and the poo drops out from your bum and lands hard in the toilet bowl, sending a splash of water onto your bum, cleaning your bum so you don't have to wipe it with toilet paper.
Example:
Oh, WATER SHIT! The water that other people's shit have been in is now on my bum! Now I need to get a towel to... oh SHIT! Now where can I get a towel?
Oh, WATER SHIT! The water that other people's shit have been in is now on my bum! Now I need to get a towel to... oh SHIT! Now where can I get a towel?