assplash 

The splashing of toilet water against the anus and buttocks as a result of heavy stools or Explosive diarrhea

While sitting on the shitter, I squinted in disgust as the assplash licked at my rear.

assplash by Dr. Roid September 11, 2004

assplastic 

Synthetic material used for the cosmetic enhancement of the buttocks.

You should never buy assplastic on ebay.

Only a professional should inject you with assplastic.

assplastic by Smiling Larry March 9, 2011

Assflash

The act of flashing your ass as oppose to a front flash. This is also known as a backflash.

Julia totally just assflashed me!

Assflash by Alien in Hotchkiss January 27, 2010

asslashed 

Asslashed is a unexpected nasal sensory attack and injury to one's neck movement in disgust to someone’s foul ass gas making them nauseated. Symptoms include verbal disgust, immediate evacuation of the vicinity of the person smelling such, feelings and/or actual vomiting, , noticeable change in one's candor and/or appearance from pleasant to disgusted.

The ass gas that came out of Richie's was so foul, gross, and repulsive, that I got asslashed.

asslashed by SWROBERTS August 12, 2018

Assplasty 

The process of having a new ass implanted.

Person 1: "Wow what happened, she has a nice booty now!?"
Person 2: "She had an assplasty"

Assplasty by Smokey7722 October 9, 2008