Knuckling is the act of 2 bros fist bumping eachother. As the two bros fist bump eachother, a third bro proceeds to slide his dick between the other bros touching knuckles. He then proceeds to fuck their knuckles.
Ben: Are colin and adam knuckling with that guy over there?
Sean: Yeah that dudes dick is gonna be super sore wow.
by Zsean January 6, 2018
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A term used to define a male esp brown skinned, or someone who is down for your cause. or who will fight for you.

Like the knuckles of Tommie Smith and John Carlos. They raised thier knuckles to the sky wearing black gloves standing on the olympic podium in 68 to symbolize the explosion of the black revolution.
I'm down for my knuckles, I'll ride for my knuckles, this is for my knuckles.

Fuck a Nigga! I only have love for my knuckles.
by Trinide October 25, 2007
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Any friend that assists you in your endeavors, or that you assist in theirs. A knuckle is of equal standing and not be confused with a minion, even though they may let you take the lead in situations where they are assisting you, just as you let them take the lead when you are assisting them.
Some of my knuckles came over last night and we gave the car a tune up and put in new speakers.

I burned my songs onto a mix cd for one of my knuckles.

One of my knuckles found a generator for next weekend.

by squegie August 30, 2005
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a precise point on ones finger made efficient for causing maximum damage
male b: im so mad at your mom, she knuckled down my house last night!

male j: we have the same mom! knuckle head!!
by jordan sollinger January 5, 2008
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4 grams of a substance, preferably cannabis
Let me a knuckle of that Chemdawg
by speedcore909 September 8, 2017
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Hey Marty, you got any knuckle?
by Ghostship September 14, 2006
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When a quality nugget is so densely dank that it makes a noise identical to that of someone's knuckle when it is tapped on a surface.
I just dropped some serious bills on that zip so those buds had best knuckle.
by The 4th Horseman July 13, 2008
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