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."
As a girl is giving you a blow job, all of sudden she punches you in the balls
Dude, Stacy busted a broken turtle shell on me last night.
And it still hurts.
During sex, when a person is about finish first, their partner punches them in the face or back of the head, thus allowing the trailing person to finish first.
He was about to cum, so I blue turtle shelled him in the face.
That of which turtles spawn with.
"The shell on turtles, do they spawn with it?" -xQc on the topic of turtle shells
When it’s cold or not and your dick decides to back inside yourself like a turtles head goes back in it’s shell.
Gawd damn! My dick gawn back in his turtle shell! What’s wrong lil guy? Ya cold? Come on out, I’ll keep ya warm in my hand.
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.
Men who ride Harley's or other cruising type bikes, who wear turtle shell style helmets because they are not driving fast enough to need a full helmet usually. And they ride on a bike that has had custom steering handles installed. The handle bars are usually raised an additional 10 to 12 inches, making the rider appear to be hanging from a monkey bar.
"How bout that turtle shell on a monkey bar, his tiny helmet had huge skulls painted on it and he was barely able to hang onto his monkey bar because it was almost too high..."