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a term created by the r/selfharmpics, the proper term is the dermis, the layer above hypodermis (fat) and below the epidermis (outer layer, does not bleed).

"styro" refers to Styrofoam, as someone once said the white layer (dermis) looks like Styrofoam.
"I finally hit styro"
"make sure to bandage it"
by Gallion May 24, 2018
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Oct 29 Word of the Day
When you meet with someone without anyone knowing except you and the person.
by Timbs March 08, 2017
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2
dayum styro is a leet mother fucker his awp is insaneeeeeeeee
by Styro January 09, 2005
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