When a guy wears pants that are too tight for him and his pee-pee makes an outline in his pants giving the illusion of a turtle popping out of his shell

the head of a small animal known as a 'turtle'. Jesus, how obvious was that?

When you moon someone and do a fart and a piece of shit sticks out then pops back.

Turtle head looks like a dick

Little tiny turds that are relevent to dingel berrys but they don't cling on to your ass, instead they fall from it when you pinch little turds out.

Pooop at peaking out of my ass to see you

poop about to burst out, usu. at the southern end of a person, but sometimes out of a different crevice of the human body, such as the face