assflap 

an extraneous piece of skin or webbing that covers the anus

Before we had the sex, I had to lift up her assflap.

assflap by Gooney Goo Goo April 9, 2003

assflap 

the slit in the seat of a pair of longjohns or union suit

"john forgot ta open the assflap and shat all oner hiz longjohns"

assflap by hemp May 13, 2005

assflap pants

The pants you see that one homeless guy on the A train in Chicago wearing. Oh, did I mention he smelled violently of spoiled milk and stale cumin?

"Did you smell that nigga on the train with the assflap pants? Homie was rank!"

assflap pants by assholeripper69 August 13, 2022

Assflap Dicky Douche

Jen.

Jen is an assflap dicky douche.

Assflap Dicky Douche by PL4TYPU5 December 6, 2023

assclapper 

Someone so stupid and fat that when they say something, the only sound is the echo of their ass cheeks resonating.

Jimmy is such an idiot -- what an assclapper!

assclapper by BelleMere July 24, 2010

Assflames 

the ability to shoot flames out of your anus to fly around and in incinerate everything in it's path. a lois/aldo.

I only have one thing to say...assflames.

Assflames by zombiexkay June 30, 2011

Ass Flap 

A hole located in the backside of the boxers of an individual who puts his/her boxers on backwards

*group enters hot tub*

Friend 1: "Look at this clown! He put his boxers on backwards!"
Friend 2: "Would'ya look at that! I've got an ass flap!"

Ass Flap by OTJdog March 26, 2017