Buttmurder

The act of having your anal cavity completely destroyed possibly resulting in death.

I was so mad at my ho that I buttmurdered her with a kfc spork.

Or

Scott: Awe man I feel like I got buttmurdered last night.

Mark: Sorry bro tequila and cialis don't mix well.

Buttmurder by Marksabol August 24, 2016

buttsurfer 

Male or female who enjoys performing anal sex with their penis and/or dildo

My brother, who is a expert buttsurfer, performed anal sex with his cousin Hal all through the night.

buttsurfer by Ima Feinlen February 7, 2004

buttmugger 

Thievery of the anus.

Stay away from him he is a buttmugger. If you deal with him you will no longer be an ass virgin and chances are you won't even know it. He is that slick!

buttmugger by Cornbread916 December 22, 2013

Buttlurker

People that lurk around as though as they are inside the ass.

That Buttlurker over there is staring at me

Buttlurker by Jig January 8, 2004

buttsurfer 

A member of a clueless freshwater species known as the river kayaker who ventures out of his element and into the lineup thinking he or she can actually surf, with no concern for the hazard posed to real surfers by a huge uncontrollable boat and paddle. Obviously afraid of salt water, as indicated by presence of nose plug, helmet, and life vest.

"Hey, bra, what's up with that buttsurfer crowdin' the lineup? If he likes sitting on his ass so much, shouldn't he stay in his cubicle?"
"Dude, I know, he totally ran me over when he got caught inside on that big set!"

buttsurfer by mountainsharkbait May 8, 2009

buttunders 

The muscles under your butt and at the top of the legs.

I worked out my buttunders at the gym.

buttunders by ShellPT June 24, 2019