Rain Fart 

When a wet, runny fart seeps down your legs.

Was that a rain fart?

Rain Fart by MegaMoon July 26, 2016

out farting in the rain 

A euphemism for having nothing important to do and a lot of free time.

He’s probably out farting in the rain!

out farting in the rain by Dr Bunnygirl December 7, 2019

rainfart 

Where you fart liquid poo pebbles like rain

Aw babe I did a rainfart in my pants

rainfart by Nan bread February 9, 2024