Styro 

Slang used by self harmers for the dermis layer of skin. If you hit styro, it means you've cut down to the dermis.

Styro cuts will be white at the bottom and will take a few seconds to start bleeding. They also bleed way more than cat scratches, and scar a lot worse.

Fuck I just hit styro again

Styro by anonymous March 11, 2023

styro 

the fat layer under skin , it looks like styrofoam , self harm slang

they hit styro for the first time

styro by beeeeeeeeeeeeeeeeeeechurger July 26, 2021

Styro 

A Long Self-Induced Cut, to release blood. Usually shallow, the cut is only deep enough to bleed.

My mother caught me doing Styros on my arm last night. Im so grounded.

Styro by Korokyama April 6, 2021

Styro 

a godlike counter-strike player

dayum styro is a leet mother fucker his awp is insaneeeeeeeee

Styro by Styro January 9, 2005

Styro 

Referring to something or someone that is cool or crazy

“Omg that’s so styro”
“That was styro asf”

Styro by shemma watins November 26, 2021

Styro-Slap 

A game in which players try to keep a styrofoam cup in the air. Mostly played by extremely bored teenagers.

Dude, we've got twenty minutes 'til class starts! Break out that cup and let's play some styro-slap!

Styro-Slap by A Bored Teenager February 13, 2007

Styrofoam 

Slang used by self-harmers to refer to the second layer of skin (the dermis). Its white appearance resembles styrofoam, hence the slang. Usually shortened to "styro".

Lily: I think I made a styro cut.
Alice: I hit styro a couple times before, it's very scary!
Edward: Be careful with styrofoam cuts, they have a higher risk of getting infected.

Styrofoam by Wonky Johnnyette May 22, 2021