Buttxt

To butt text someone.

Very similar butt dialing.

Butt dialing(i.e. your phone is in your pocket or bag and it rubs in a certain way that dials a persons phone number, that you did not intend to call.)
Reason we say butt texting or butt dialing is because when smart phones first came out alot of the time people would put it in there back pocket (where your butt is) and if it rubbed a certain way, it would sometimes send a call out. That's is the reason why we refer to it as butt dialing/texting.
Example of a buttxt:

Your phone is in your pocket or bag and it rubs in a certain way that it sends a text to a person you were not intending to text.

You get an odd text from someone, a bunch of gibberish...or you just talked to then and the text doesn't jive with the conversation. You may reply through call but most likely through text "did you just buttxt me?"

Buttxt by preciousndeadly March 16, 2018

buttsturbate

When your butt itches so badly that you have to rub it really hard and it gives you sexual gratification

I buttsturbated yesterday

buttsturbate by MISTER OWNINATOR January 12, 2010

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

doing the buttstroke 

Slang for when someone propels themselves through a still body of water, usually a swimming pool, entirely by passing gas.

This amazing and talented young woman apparently has the most powerful farts on the planet; I watched her doing the buttstroke the entire length of the high school gym pool!

doing the buttstroke by Dr Bunnygirl June 26, 2021

Butttrisa 

A preson that is a prostitute that sells her butt and eats ass bugers

Butttrisa are weird as fuck

Butttrisa by Aidqn March 24, 2021

buttstonked 

Being so twistedly fucked up (extremely inebriated in some form) that you literally can not and do not want to do anything.

X: Dude, that party was intensity in ten cities!

Y: Totally so dude, let's roast these righteous herbs and get thoroughly buttstonked to celebrate!

buttstonked by KyleFromTheAmandaShow March 24, 2014

buttstroke

the act of striking someone with the buttstock of a rifle, carbine, or shotgun. This is in contrast to "pistol-whip," which is the act of striking someone with a handgun, while gripping either the handgrip or the barrel/slide, but more commonly the latter.

"The brave Marine, having expended his last magazine, but lacking a bayonet, saw fit to buttstroke the charging enemy combatant."

buttstroke by Jambo11 June 27, 2009