Inverted Turtle

When an individual is performing oral sex on a male, they cup the balls in the palm of their hand and insert their middle finger into the bunghole. The term comes from the way the hand of the person administering it looks like a turtle that has been flipped over.

My girlfriend was sucking my dick and without any warning she gave me an Inverted Turtle. It felt so good I immediately busted a nut in her mouth.