When someone sucks at everything but can't admit it to themselves and get angry at everyone trying to ruin specific peoples lives but fails at it. Especially when it comes to sex they are ALWAYSwhite knuckled
See that girl?
Yea
She's a white knuckle, don't talk to her! she'll make you regret it!
The act of performing an anal creampie (male or female) then proceeding to fist them, shoving the cum deeper into them getting your knuckles white and creamy.
"Hey Julie, was wondering if you were still down for a White Knuckle tonight."
Awaiting an outcome, or termination, of something with almost unbearable anticipation (as in clenching one's fists tightly to get through the agonizing final days or moments of waiting for something to happen or be over with)
Brooke's mom was told she couldn't have a drink for 30 days before the wedding, and she knew she would have to white-knuckle it!
a common reference to the action and state of mind when one is either street racing in their automobile, or ont the track. the physical meaning is reference to the pigment of ones knuckles fading from holding the steering wheel tightly. the mental reference is due to the edgy state of mind one is in, when in a similar situation.