Definitions by Whoopdaddy

White knuckler 

A women or girl who upon giving one a hand job, grabs and holds on for dear life. They grasp until their knuckles turn a faint tan or white color. In some extreme conditions, friction burns may result.

Wow, my penis is still recovering from that white knuckler!

White knuckler by Whoopdaddy January 18, 2012