The fart wall 

A fart wall is when you and your best friend don't fart in front of each other because its 'embarrassing' However if you do fart in front of each other you have broken the fart wall.

Person 1- I'm going to fart so ill mute the facetime.
Person 2-No don't if you fart in front of me we will break the fart wall!

The fart wall by Gertrude The quaking goat. July 7, 2018

Break the Fart Wall 

The point in a relationship where one first farts in front of the other

The honeymoon must be over, Tim felt comfortable enough to break the fart wall in bed, last night. This better not escalate to Dutch ovens any time soon..

Break the Fart Wall by MILK27 June 15, 2018