Top Definition
A nythocc is a rare mutation seen on male genitals that lies between the penis and testes and always flaps to the north, regardless of which way the beholder is facing. The nythocc is an excess flap of skin that is often used as a compass.
"So, we were about to get it on when Nick Jonas took off his undies and I could swear he had a nythocc!"
"Maybe he just has a third testicle."
by Gnarled November 30, 2008

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