Butt Beast 

Wild animal who has a highly tuned sense of smell that is dedicated to the scent of the human butt. The butt beast feeds solely on the human butt, and generally lives alone, but sometimes hunts in packs of 10 to 20 other butt beats. Normally one butt beast can bring down a full grown human, but some humans are just plain fat and this is when the butt beasts will work together.
Butt beasts enter a feeding frenzy when feeding or hunting butt, this is similar to the feeding frenzy that sharks experience.
The only know enemy of the butt beast is an Alicia, the Alicia is a striped animal that also loves human butt. The Alica and the butt beast sometimes have territorial battles to the death.

guy1- "dude did you hear that?"
guy2- "what?"

Guy1- "I heard a fart noise, did you fart?"
Guy2- "no I did not fart"

Guy1- "oh no!"
Guy2- "what?"

Guy1- "run! a butt beast is following us!"

Butt Beast by scuba yetty March 9, 2009

butt savage beast 

Someone who is more that just a butt, they are big poop heads.

You are such a butt savage beast!

butt savage beast by Topher P February 25, 2005

Buttblast paradox 

A situation involving a giant bowel movement that is contradictory and puzzling.

Kevin loved Taylor Swift but he couldn’t find anywhere to have a big shit at her crowded concert. If he couldn’t shit soon he felt like he was going to die. It was a buttblast paradox.

Buttblast paradox by Summer of Chris August 14, 2019

Kamikaze buttblast 

The act of dressing up as dragon ball z character, goku, while penetrating an anus and therefor releasing his high fructose porn syrup inside the rectal cavity.

"Hey, did you see Ruth last night?"

"Yeah, I kamikaze buttblasted that phanny after I went super saiyan."

"So, you emptied the dragon balls,huh?"

Kamikaze buttblast by Poopid69 January 27, 2017

buttbeast 

A vicious drooling beast residing in Gaywood, King's Lynn, S. England. Thought by many to be mythical, the evil faggot creature leaves its lair by night to stalk the streets of Norwich. Many an unsuspecting stranger has been caught unawares and savagely ass-raped by this mindless demon. The folk of Norwich tie garlic over their doors to ward off this enemy of all things heterosexual.......

The folk of Norwich fled when they heard the buttbeast's lurching approach.......

buttbeast by rampagus_maximus November 1, 2003