1) A terminology used to describe when someone is holding onto something extremely tight, due to a stressful or otherwise tense situation.

2) Also a synonym for someone feeling stressed, or tense about life.
"When we took that corner at 95, everyone in the car had white knuckles"

"You've had white knuckles since you got served with divorce papers, are you going to be ok?"

"We call him white knuckles, he stresses about EVERYTHING!"
by Capso March 06, 2010
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When a player puts all there weight forward to excell forward.
Look at #67 he has white knuckles, they are clearly going to run the ball.
by SafetyFirstSports April 19, 2015
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When you're taking a situation as it comes and flying by the seat of your pants. Often attributed to anxiety, and feelings either good or bad. A reference to clinging fiercely to something, such as a rope, to the point where ones knuckles would turn white from forcing blood from the capillaries.
Jesus, I'm sweating, I was white knuckling my way through that interview. Those guys are scary.
by Markus J August 20, 2008
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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!
by Gregor! July 22, 2006
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To hold somthing with your hand(s) in a constant position so tight and long that blood rushes away from your knuckles and they become pale and sweaty.
He was white knucklin' the steering wheel.

That new video game will give you white knuckles.
by HybridFlare September 16, 2005
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When one is driving and has to piss so bad that they are squeezing the steering wheel so hard that there knuckles are white.
I was white knuckling for 15 minutes this afternoon when I was stuck in traffic.
by Johnny Tats November 08, 2007
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