Buttwings 

Buttwings are small wings that can be found on the rear-end (butt) of something; they are generally found on non-existent things like Victini and anything that's free to buy.

Victini has a pretty prominent, but small pair of Buttwings that allow it to fly around and cheat the laws of physics.

Buttwings by Mynamedoesnotmatterinanyway January 11, 2012

buttwings 

Love handles are are not on the waist but above the butt so it looks like butt wings. They typically protrude over pants and are very obvious.

Damn, that bitch has buttwings!

buttwings by poodypaul November 29, 2007

Balloon Butting 

Balloon Butting is when you stick a balloon into your anus and then have a friend inflate it to induce sexual pleasure, or you self inflate using a series of tubes/straws.

Hey did you hear that Paul was Balloon Butting?
Ya! It totally burst inside of him and he pooped out plastic!

Balloon Butting by RickyPJangles May 18, 2014

Buttwink 

A buttwink is when a person flexes their anal sphincter, causing their anus to visibly contract, effectively "winking" with their asshole. Buttwinking can be performed as an obscene gesture, or in a sexual context it can be either a sign of affection or a greeting.

To buttwink, simply use the same muscles used to defecate to flex your anus.

This act should not be confused with mooning (merely exposing your anus) since buttwinking is considerably more rude.

As Sensei Doug walked to his dojo, the rude employees of a strip mall store lowered their drawers, pointed their behinds towards the window, and contracted their assholes to buttwink at the passing martial artist.

Buttwink by Sensei Doug December 6, 2017

Batwings 

When one's scrotum sticks to the inner thighs due to sweating in the groin area. This situation can be nicknamed 'Batwings' because the image created by this scenario can resemble a bat and its wings. The shaft of the penis can be see as the body and the stretched scrotum to either side can be seen as the wings. Many males (and hermaphrodites) find this common occasion displeasing.

Batman: It sure is hot in this cave.
Robin: Yeah I know, I'm beginning to have batwings.
Batman: That was very unnecessary.

Batwings by How are you today? October 6, 2009

Buttinsk

A word Shawna (or Nanalew on YouTube) and Tessa (or Meekakitty on YouTube) use to describe each other. It can also be used as a synonym for butt or bottom, or an insult.

"She's a big buttinsk."

Buttinsk by nanakitty February 5, 2012

Nut Butting

When a man and another man ride a motorcycle together. Named that because the one mans nuts touch the other mans butt.

Paul: Hey Aaron, wanna take a ride on my new bike?

Aaron: Maaaannn, I don't want to go Nut Butting with you.

Nut Butting by Aaron East August 19, 2012