To masturbate to something.
Student 1: Man, our English teacher is so hot!
Student 2: Yeah did you see her new profile picture?
Student 1: Yeah man, I'm gonna throw it some knuckle tonight.
Student 2: Yeah did you see her new profile picture?
Student 1: Yeah man, I'm gonna throw it some knuckle tonight.
by FertDeDoosh August 3, 2017

A condition often aquired at the end of the NCAA Basketball season during Conference Championship Week and the first few rounds of the NCAA Basketball Championship--affectionally known as March Madness. It results from changing the channel every few seconds trying desperately to catch every second of every game, but in the end never fully achieving the satisfaction and release from the closure of seeing every play of every game.
Caller: "Dude, have you been watching March Madness hoops?"
Friend: "Hell yes! The only thing is, I've got to put a bag of frozen peas on my knuckles in between games. Having four games on at once is killing me, I've got a serious case of Blue Knuckle...it's a damn good thing I've got two hands!!!
Friend: "Hell yes! The only thing is, I've got to put a bag of frozen peas on my knuckles in between games. Having four games on at once is killing me, I've got a serious case of Blue Knuckle...it's a damn good thing I've got two hands!!!
by Guerre July 31, 2012

the act of sticking your middle finger knuckle into the anus while jamming it around and looking for gold
by Jonathan toews 19 April 13, 2025

A carpel-tunnel like disability that is caused after driving for a long amount of time with your hands tightly gripping the wheel.
by Merferker October 9, 2011

by Johnpiraino84 February 8, 2022

by Uhoo457 May 19, 2021
