Buttsore 

Used to describe someone who has trouble taking a joke, especially a joke that most people find funny.

Dennis was buttsore, he wanted to remove a definition that used his name on urbandictionary.com.

Buttsore by Peter Bitter June 1, 2004

Buttscrew 

Another word referring to the act of anal sex. It is commonky used by middle schoolers to talk about how cool the homosexual anal sex with their bum chum in boy scouts was.

Tim "that buttscrew i did last night with ryan was so sexy and fun"
Tyler "damn right buttscrew is only cool when its with your buddies"

Buttscrew by Flamingoat May 28, 2018

International Buttstretcher Day 

A holiday celebrated every August 4, enacted by cs188 in 2016. Not much is known about it, but as the day's name suggests it likely involves stretching butts.

"WOO-HOO! It's International Buttstretcher Day, ha-ha-ha-ha! Awww yeah......awww yeah......"

International Buttstretcher Day by Arrceeay June 28, 2019

Hickory Buttscrew 

Leapfrogging stalled traffic by exiting a merging construction lane at the last minute, effectively shaving minutes off your drive time. Often framed as an accident; the common reasoning being "I didn't see the merging signs or the hundreds of stalled vehicles waiting their turn," or "I'm a better human being."

I can't be late to my daughter's recital again. Time for the hickory buttscrew.

Hickory Buttscrew by Scr1bble June 24, 2011

Buttfore 

A word trick; used amongst immature and dumbassical people.

Julia: "You're a Buttfore"
Kathryn: "What's a Buttfore?"
Julia: "Pooping, Silly!"

Buttfore by Iheartbuttfores November 5, 2009

Butt Sore 

being upset about something trivial

Michael J is so butt sore right now

Butt Sore by beepboopimarobit January 25, 2009

butt sore 

Being in a generally grumpy mood and/ or getting worked up and frustrated over something. See also moated

What's wrong with Chris? I don't know, he's all butt sore over something.

Dude, don't get butt sore!

butt sore by The Cobra January 18, 2005