Abrasion 

an irritated, rough, or worn away area of the skin.

the horse was so bothered by the flies, it rubbed its skin down to bumpy abrasions.

Abrasion by appaloosagurly June 28, 2009

Micro Derm Abrasion 

Micro Derm Abrasion is what happens when you use cheap toilet paper - it makes your butt raw after repeated wiping much like sand paper would do.
Micro Derm Abrasions are common in office buildings, gas stations, Grandma's house, etc. In extreme cases there are chunks of wood embedded in the tissue.

Using the toilet paper in our office building is like getting a Micro Derm Abrasion on your butt.

Micro Derm Abrasion by 9key April 24, 2006

Microsperm Abrasion

When a man cums on a womans face and rubs it in with his ball sack.

My skin was feeling a little dry so I asked my boyfriend to give me a microsperm abrasion.

Microsperm Abrasion by TTBbitch July 20, 2010

Rock Abrasion 

Two people who are really cold rubbing their extremely hard, coarse nipples together making the theoretical mental sound of two rocks being rubbed together.

Girl: My nipples are so hard.
Boy: You wanna...rub’m together?...
Girl: Uhmmmm...yah
*
Boy: Mmmhmm that’s some dope ass rock abrasion.

Rock Abrasion by Samwise Enzelick July 10, 2020

dingleberry abrasion 

a red mark left on the ass after a dingleberry is removed.

Once I cleaned off all the dingleberries there were dingleberry abrasions left on my ass!

dingleberry abrasion by I feel Beasty June 15, 2009

gelatinous abrasion 

A wound that results on the human skin after having been power-washed with nickelodeon gak. Resembles a cut filled with gak.

1) Hook up your power-washer to a tank of gak.
2) Turn on power-washer.
3) Spray people you want to create gelatinous abrasions on.
4) Sit back and enjoy the glory.

gelatinous abrasion by Sgt. Fupa and Lt. Tally Wacker March 31, 2010

Waterfall Abrasion 

When you have a cold and you've wiped your nose so many times, the space below has turned red and hurts.

A: You look sad, are you alright?
B: Yeah, I've got a cold and I got a Waterfall Abrasion. It really hurts.

Waterfall Abrasion by cyclopentane April 4, 2022