bare-knuckle handshake 

A diplomatic gesture like a handshake or a greeting that clearly and civilly demonstrates the fierce and unrelenting determination of the part making the gesture.

As we began negotiations on the project, it started with a bare-knuckle handshake.

bare-knuckle handshake by akconstant November 16, 2019

Reverse knuckle shuffle

Masturbating with one’s hand inverted as opposed to the conventional way of holding your penis that makes it feel different than normal like someone else is jerking you off.

Joe wanted an away game, so he gave himself a reverse knuckle shuffle.

Reverse knuckle shuffle by VanD Cape January 10, 2020

Two-Knuckle Punch 

Proceded to make a fist with two knuckles protruding. Then strike object with said protruding knuckles.

Drew insulted me. So I gave him a "Two-Knuckle Punch" straight to the urethra.

Two-Knuckle Punch by Mark Twain Gay Nephew January 20, 2020

Doodie knuckle 

Poo stuck in crevices on the knuckle of your finger

I fingered my girlfriends butt and got doodie knuckle

Doodie knuckle by TexasAcehole March 9, 2020

White knuckled the bed sheets 

clinching the sheets as tight as possible for fear of your life

When asked if I had anything sweet, I knew the only thing I had was my cheeks; therefor I white knuckled the bed sheets in preparation for what I knew was about to happen.

White knuckled the bed sheets by LuckyBucket52 April 23, 2020

Toe knuckle 

The bones in the toe

Don't crack your toe knuckles

Toe knuckle by Knowledge is a blessing May 24, 2020

Five Knuckle Suckle Shuffle 

Is a term used to describe a blow job given by mouth and hand which work together in perfect unison to procure a gigantic load from the lucky recipient,

So my buddy Jason was telling me his wife Andrea read a book a book about blowjobs and after doing so gave him the best Five Knuckle Suckle Shuffle he’s ever had. Hopefully this isn’t tactic she uses forward to manipulate him into getting Desquirtified.

Five Knuckle Suckle Shuffle by Tee Cee Deez September 12, 2020