Reverse Ninja Turtle 

A sex move. To wit: You get down on your back, and you spin around. Then you take your "bow staff" and you stick it in the other guy's asshole.

And then you eat pizza.

Things were getting kind of stale between Nick and Aaron, so Aaron decided to break out the Reverse Ninja Turtle and it was like it was the first time again.

Reverse Ninja Turtle by Chip Z'hoyy April 14, 2013

Reverse Ninja Turtle 

A man with well defined, possibly protruding abs. Instead of a shell on his back, he has a "shell" on his stomach.

That guy has done so many sit ups he's become a reverse ninja turtle.

Reverse Ninja Turtle by reverseninjaturtle July 18, 2016