buttflap 

Those goofy squares of cloth, sometimes cut from an old tshirt or some other random piece of cloth (but now available at hot topic probably) that alot of street punks wear dangling from the back of their pants.

Freddie had to lift his buttflap out of the way to get his H out of his back pocket.

buttflap by biscuit eater September 13, 2005

buttflap 

a flap of skin hanging from the butt

beltar conehead

buttflap by Anonymous person that has no life March 22, 2003

Buttflap 

A butthead and a funny word to say

A buttflap is like a butthead

Buttflap by 🧠🧠🧠 October 18, 2020

ButtSlap

When something is underwhelming or disappointing. Most often used in a context that involves a person describing the poor state of something, such as a meal or TV show.

"Dude, this caf food is straight buttslap." "I'm bummed bro, that movie was buttslap."

ButtSlap by Montgomery Applebottom February 15, 2018

Khaki Butt Flap

When you have diarrhea and use it as lube for anal, then smack the ass cheeks with both hands as you enter

Fuck man, I gave her the gnarliest khaki butt flap the other night after eating Chipotle.

Khaki Butt Flap by Alan Lights January 7, 2023

Buttflake 

A motor vehicle driver that, when turning left, does not enter the nearest correct lane.

Stupid buttflake! Now I can't change lanes!

Buttflake by #1Fanilow November 13, 2006

butt-flap 

A piece of cloth attached to the back of your pants or jacket covering the lower portion of your back. Usually screen printed with punk rock logos, insignias, and covered with conical or pyramid studs. Worn by punk rockers of all kinds. Extra bonus points are rewarded if your butt-flap attaches to a studded vest with pyramid or conical studs. The first known sighting of a butt-flap was as ABCNORIO in the lowe east side of New York city in 1989, although it is suspected to have originated in London at an earlier date.

"Dude, that bass player from Impaled has a killer butt-flap! Check out his vest"

butt-flap by nahthan November 11, 2005