ghost buttocks 

When a man/woman had been sitting on the toilet seat for a period of time and have warmed the toilet up. Then someone else comes along and sits in the the pre-warmed seat

I don't know who was in the toilet last, but I experienced some quite bad ghost buttocks.

ghost buttocks by Savagesaville69 April 19, 2017

incontinentia buttocks 

The wife of Biggus Dickus.

“He has a wife you know. You know what she’s called? She’s called Incontinentia. Incontinentia Buttocks.”

incontinentia buttocks by I.E.I. Industries September 3, 2023

buttockal 

having to do with the region of the buttocks

Bryan could not take his eyes away from the defined buttockal area of the man in tight spandex shorts.

buttockal by Clara Jihyun Kim October 18, 2007

dangly buttocks 

Butt cheeks that sag to the floor.

I hate long and dangly things, like mom's buttocks.

dangly buttocks by Bastardized Bottomburp May 15, 2003

Poopy-Buttocks 

Literal: Someone who still has poop of their buttocks after a bowel movement.

As an insult: Someone who is being mean.

I went to the bathroom. and there is poop in the toilet but no toilet paper. Emily definitely has a poopy-buttocks today.

Bob called me stupid. He's such a poopy-buttocks.

Poopy-Buttocks by NewYorkGiants3 June 2, 2011

chest buttocks 

Synnonym for boobs. Often considered awesome and important by straight men.

Dude, check out the chest buttocks on that girl. Man, she could feed an army.

chest buttocks by Jake Gus December 1, 2004

smack buttocks 

A Smack Buttocks is a male who has the tendancy to violently thrust his genitalia into another male partner's buttocks while a "smacking" sound is made by his testicles striking the partner's butt cheeks.

man, that pole smoker is a real Smack Buttocks!

smack buttocks by Big Wil August 18, 2006