shit-fart separator 

The shit-fart separator (AKA shitfart separator) is the muscle inside your colon, just above your bunghole, that is responsible for separating shits from farts. Usually a dormant muscle, the shit-fart separator is often only noticed if it's repeatedly squeezing and churning when one has diarrhea. The work of a healthy shit-fart separator usually results in dry farts.

I had bad diarrhea, and my shit-fart separator was in overdrive.

My shit-fart separator failed me and I accidentally sharted a little in my underwear.

shit-fart separator by Flambo Blumpkin February 14, 2008

Shit Fart Separator 

AKA SFS The shit fart separator is the divice inside your ass that separates your shit from your farts. Without this divice everything turns into a shart.

Dude are you trying to fart.
No man im testing my shit fart separator.

Shit Fart Separator by RedlegArtillerymen October 15, 2008

shit fart seperator 

The part of you butt (your cossey)that lets farts leave and keeps the shit in your ass.

Schmits shit fart seperator didn't work so when he shat he had to shcmit because he got poo on his chode hairs

shit fart seperator by concrete lab October 17, 2008

Shitfart Separator 

The shitfart separator is the muscle inside your colon, just above your bunghole, that is responsible for separating shits from farts. Usually a dormant muscle, the shitfart separator is often only noticed if it's repeatedly squeezing and churning when one has diarrhea. The work of a healthy shitfart separator usually results in dry farts

I had the Big D, and my shitfart separator was in overdrive.

My shitfart separator failed me and I accidentally sharted a little in my underwear.

Shitfart Separator by Flambo Blumpkin February 13, 2008