Buttmuck 

1) Buttmuck - When you don't wipe well after a dump, you see Buttmuck stains on your tighty whities.
2) Buttmuck - You go to sit down on an old couch and there's an undefinable smear. More than likely, someone else left their Buttmuck on that old couch.

You: "Hey, what's this stuff on your couch?"

Your friend: "oh, someone apparently sharted and left Buttmuck on my couch!"

Buttmuck by haykeydammit September 21, 2009

Buttfucker3000 

An idiot who logs into a Zoom court hearing or important with a totally inappropriate screen name which angers the judge or the person leading the meeting.

Your name's not Buttfucker3000, you yo-ho.

Buttfucker3000 by Storm Sexxwatt May 13, 2021

Biffy Clyro Buttfuck Bonanza 

An album containing every Biffy Clyro song to play in the background whilst being vigorously buttfucked or when you are vigorously buttfucking someone.

Dave - Bend over
Alan - Wait a minute let me find my Biffy Clyro Buttfuck Bonanza Album

Biffy Clyro Buttfuck Bonanza by AnonymousTrevor November 14, 2018

Biffy Clyro Buttfuck Bumper Pack 

The complete discography of Biffy Clyro, including previously unreleased material, comes with some hefty condoms so you can be buttfucked or buttfuck someone whilst the albums play in the background, help me captain of, your crippled asshole.

Hey Dan, I've just bought the Biffy Clyro Buttfuck Bumper Pack, so you better bend over and prepare to have your hole wrecked.

Biffy Clyro Buttfuck Bumper Pack by AnonymousTrevor November 20, 2018

Ghost Buttfuck 

A sexual position in which the male covers his penis in toothpaste and proceeds to engage in anal intercourse with his partner. The toothpaste then proceeds to "burn like all fucking goddamned hell, christ almighty" for the recipient, while the male feels a slight, pleasant tingling sensation on his shaft.

After ejaculation, it is thought that the combination of feces and ejaculate resembles a sort of ectoplasm. Additionally, the high contrast with potential feces and blood also increases the odds of vomiting, including a chain reaction.

"Ey, baby - lemme fuck you in the ass with some Colgate, eh? A little of the ghost buttfuck? Ah, forgetchoo, ho."

Ghost Buttfuck by johnmouseguy April 30, 2012

buttfuckshit 

-a word one uses to express extreme anger or annoyance,

-similar to bullshit, but in a stronger context.

Josh I dont give a fuck about your buttfuckshit

buttfuckshit by MKN Dictionary March 17, 2011

ButtFuckery 

ButtFuckery means bullshit

wow that's some grade A buttfuckery right there, what a load of wank

ButtFuckery by Pimp McLovin' July 2, 2015