Turtle Shelling 

The art of hiding an erection while sitting and leaning one's upper torso at a 45 degree angle betwixt one's chest and lap. The owner of said erection then proceeds to arch their back in such a way that makes them appear to be sitting upright. This causes said erection to recede into the body causing a "turtle shell" effect.

"Dude, my Spanish teacher is so hot...she had me turtle shelling all class."

Turtle Shelling by JoPaGeRi.TBC September 11, 2007

Turtle Shelled 

Usually will happen when it's cold out and your balls shrivel up nice and tight to get warm. (The wrinkles look like the pattern that a turtle shell could have)

I gotta go inside now, its cold, I'm turtle shelled.

Turtle Shelled by Herbert G. WALLCE March 1, 2019

turtleshell 

Covering your dick with your balls.

James just showed me his turtleshell.

turtleshell by Jesus66666 September 3, 2018

Turtleshellitus 

A rare birth condition where babies are born with a turtle like shell they can retract into

My daughter was born with Turtleshellitus so she retracts into her shell whenever she is scared.

Turtleshellitus by That1Seal October 1, 2025

Estranged Turkish Turtleshell 

It means your hairline is built like a turtles shell pattern

“Your hairline is receding so bad you look like an Estranged Turkish Turtleshell

Estranged Turkish Turtleshell by Other worldy insults July 31, 2024