When you are still with someone but you feel single.
When your about to have sex and your dick gets soft due to nerves, akin to a turtle going into its shell.
I was about to smash, but she makes me so nervous that I turtled.
A type of dance move to spin on the back like a turtle's shell.
I'm doing the turtle spin.
When you are having anal sex and you get feces on penis.
I was doing her doggy style and pulled out and she gave me a mud turtle.
When your taking a shit, but half way through, you suck the shit back up into your asshole
I just got done putting the turtle back in its shell
Ducking your head in and out of a turtle neck in a way that can be interpreted as foreskin.
Look at that man doing the funky turtle