While you are anywhere other than a bathroom, you have to deficate so bad that your fecal matter starts coming out of your ass. In essence your crap is poking out of your ass like a turtle's head.
I had to shit soo bad, I was turtlein' while walking home from school.
When a male spends decades without trimming pubic hair, and his small member becomes engulfed by the pubes, resulting in the appearance of a "turtle in the weeds"
Shaun " Dude I did some manscaping this weekend and could have filled up a five gallon bucket with all the hair"
Dan "I recently did the same and it is always itchy afterwards"
Michael "What is the world are y'all talking about, what is manscaping?"
Shaun"Michael if you're 56 and never trimmed your bush you probably look like a turtle in the weeds down there!"
When you go a month without pooping, and the turd is so huge it stretches you hole so far that afterwards it hangs down loose like the collar of a turtleneck sweater.
I went to camp and couldn't poop for a month. When i finally did, it stretched my asshole out so badly now I've got turtleneck butt.
A species of human-like animals that are born on the island of turtopia carry the turtlenerd gene called turtitis and, are usually adopted by human parents. Turtlenerds are born with a shell, but human parents generally have it removed at a young age so that their child can better fit in with other human children. Turtlenerds commonly wear jackets zipped all the way up their neck in order to cope with their shell removal. As they age, turtlenerds develop a liking of both food and reading.
Jill-"Ashly did you that girl over there?"
Ashly-"Yeah she's really weird. She always keeps her jacket zipped up and all she does is read."
Jill-"I know, she must be a turtlenerd or something"