flipperknuckle 

When you're fingering your girl and you enter with your knuckle. Then you start rotating your knuckle while inside.

Girl: Ohh that was amazing, what was that?

Guy: Just the old flipperknuckle.

flipperknuckle by Jaylover101 April 15, 2024

Flippernackle

A way to express shock or genuine dismay

"what the flippernackle is going on here?!

Flippernackle by Telebee December 21, 2023