sphincterama 

A word used to describe a spectacular display of anuses, either actually or metaphorically.

There’s this amazing group photo I’ve kept of all of my ex-office mates, that includes everyone from the CEO to every last underling that worked there, at one of our seriously debauched annual holiday parties, which I’ve simply and aptly titled, “Sphincterama.”

sphincterama by Dr Bunnygirl November 29, 2022

sphincterage 

The act of laughing so hard that one will clench their anal sphincter with enough force to induce internal bleeding.

LOL! That joke was so funny. I have serious fucking sphincterage now.

sphincterage by A Short Ass Llama March 15, 2017

sphinctermeter 

The part of the anus that manages the delicate flow of waste which differentiates and carefully selects what shall pass based on it's current state - whether it be in solid, liquid or gas form. This phenomenal muscle is highly used when diarrhea is present and the person is unsure if there is a liquid or gas eager to exit from the anus. In many instances it allows gas to expel while delicately holding back a tsunami of molten fecal matter. During moments of constipation however it remains unused.

Josh: Dude the other day I was at the movies and I had some major diarrhea. Luckily my sphinctermeter let me release gas from my bowels while keeping back the mother load of explosive goo.

William: Dude that's disgusting. Did you eat something bad?

Josh: Your wife's chili.

sphinctermeter by Dirty Burrito February 9, 2019

sphincterization 

the buildup of anal sweat caused when one is physically active yet refuses to wash themselves for days on end.

Bill was quite a hockey jock, but suffered from massive sphincterization because he wouldn't shower after each game.

sphincterization by Nick Andrews June 1, 2007