Knuckle up

To masturbate
The act of masturbation

Guy 1: Did you see Stacey?

Guy 2: Yeah, total nipple slip! I'm totally going to knuckle up to that later

by leobaby1 November 18, 2011

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Knuckle Up

To prepare to kick another's ass, getting prepared to engage in fisticuffs

If you get up in my grille, you best knuckle up, motherfucker

by stefanali pops September 26, 2005

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a phrase uttered in encouragement meaning: "muster your courage, intestinal fortitude and love for the American-way in preparation for an upcoming (or admist a) challenge
of epic proportions!"
(uttered many times by one of the dudes in the movie "The Matrixs:Revolutions" during battle
against the electro-mechanical foe)

"Here they come boys ... Knuckle up!"

by abc July 13, 2004

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Knuckle Up!

To Make Reddy, To Make Preparation, To Assemble, To Focus on the objective, To concentrate

Tomorrow's the big day people, there's no room for mistakes, so all of you better Knuckle-Up!

by ElkarO November 5, 2003

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knuckle up

to prepare to fight.

Guy 1 "i was at the bar chillin talkin to this girl after the band played, then this dude looked at me like he wanted a problem."

Guy 2 "what happened?"

Guy 1 "I had to knuckle up then his boy pulled him back."

by J Fri May 11, 2008

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