Chuckin' knucks 

Playing craps or other dice relates games; the act of throwing dice from one's hands

I was at the casino til 5 am just chuckin' knucks.

Chuckin' knucks by FrethB123 November 13, 2023

chuckin knucks 

Throwing fists in a fight

This dude came at me tonight, bro. So I started chuckin knucks on him until he was asleep!

chuckin knucks by Brosephguay February 25, 2018

knuckle chucking

The act of aggressively masturbating.
To stroke your cock in a very enthusiastic way.

I could hear the dude in the next stall knuckle chucking .

Mark has been locked in his room knuckle chucking ever since getting home from the strippers.

knuckle chucking by Fukucifer August 28, 2017

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger.

Yeah, people actually do use this term, but they get it wrong mostlys.

The five finger, knu... aaawwww, fuck it. I whacked off.

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger. by Gumba Gumba March 15, 2004

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger

Masturbation.
In other words:
Choking the chicken
Choking the monkey
wacking off
jerking off
shaking hands with man's best friend
teasing the weasel

Dude, we all know that last night you did the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger.

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger by Alex Bahder January 27, 2006

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger.

fucking ur hand intematly or hardcore

i do the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger way 2 often

the five finger knuckle shuffle on the one-eyed, blue-veined, purple-headed, custard-chucking, salty yogurt slinger. by chaseathon! September 22, 2003

the five finger knuckle shuffle on the one-eyed, blue-veined, pink-headed, custard-chucking, salty yogurt slinger 

The process of masturbating

He was doing the five finger knuckle shuffle on the one-eyed, blue-veined, pink-headed, custard-chucking, salty yogurt slinger in his girlfriends car

the five finger knuckle shuffle on the one-eyed, blue-veined, pink-headed, custard-chucking, salty yogurt slinger by Silky Johnston June 9, 2006