Noun:
Someone who doesn't get any pussy.
-Always fucking their own knuckles: masterbating.

Verb:
To finger blast a chick.
-Penetrating the vaginal cavity with one's knuckles.
Use in colloquial dialogue:
-"Atleast I'm not a knuck fuck like Andrew!"
-"Dude, all I had to do was knuck fuck a bitch and she got all wet."
by Vin November 12, 2007
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When someone is talking crap so you want to fight them for when you squeeze a fist your knuckles become white
He was talking shit about my girl he needs to white knuck
by Srudbacker49 October 22, 2018
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Someone who does not wipe or wash their hands after fisting a bunghole.
He refused to wash his hands after fisting my now elongated bunghole. Whatta knuck naster.
by TJT FIEND May 29, 2009
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Giants fan who leaves the server a ton because he can’t hold his emotions then goes crazy. Also rules the world with co-leader rifty Aka soon to be mod
by Your never know February 2, 2022
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holding your knuckles close to the camera while online. .
i gave my grandson i-knucks while skyping.
by jacob d. m. August 30, 2010
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See brass knuckles
A set of metal finger rings or guards attached to a transverse piece and worn over the front of the doubled fist for use as a weapon.
That boi stole mah hoe so I'ma fuck him up wit' ma brass knucks.
by Stevey Starling January 5, 2006
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A game most commonly played by a minumum of three inebriated partygoers as follows:
1) Mystery knuckee holds his or her fists straight out apart from one another
2) Mystery knucker 1 writes a four letter word in sharpie across the knuckee's right knuckles
3) Without seeing what knucker 1 wrote, mystery knucker 2 writes a four letter word across the knuckee's left knuckles
4)Knuckee is commanded to "knuck 'em," bringing his or her fists together for a sometimes brilliant, sometimes idiotic, but always hilarious set of knucks.
"LOVE HOLE" is a classic mystery knuck.

Keep in mind a couple of Mystery Knuck guidelines to ensure for consistent knuckings:
a. Remain conscious of which fist you are knucking. the right fist is the first word and the left is the second word. It's important to use a word that will function well on the fist you are knucking.
b. When in doubt, use words that will always work. "Dick," on men's knucks, and "tits" on womens knucks will work on either fist with practically any other word. It's tempting to get creative, but keep in mind that the more risky of a word choice, the more likely you are to end up with well-meaning, but ultimately nonsensical knucks like "VAGI XUAL."

These are the basic rules. More skilled/drunker mystery knuck experts oftentimes utilize symbols or words with more or less than four letters. It's your sharpie and your friends' and acquaintances' knucks, so don't be afraid to experiment!
Actual mystery knucks:
dude hole
tits burg
fury fuck
dick pain
fire tits
fuck fuck
butt pump
by David LaBurglier June 23, 2008
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