knucklebump 

herion

knucklebump all up in this whoa!

knucklebump by faggymcfaggerton November 26, 2010

Knuckle Tucking

When a male tucks his weenie between his legs.

During a scene in "Silence of the Lambs", Buffalo Bill is "Knuckle Tucking" infront of the mirror.

Knuckle Tucking by hiddenPilgram October 5, 2011

Knucklebush 

When a male or female decides to wear a tight ass bikini/speedo bottom and has pubes sportin out the sides.

R: Dude look at that guys knucklebush! His ass needs to manscape!
M: I hope a seagull doesnt try and dive at it!

Knucklebush by Yourmomspanties February 10, 2013

Knuckle reject 

When you attemp a fist bump, but the other person denies it.

"Hey bro, what's up?" (Attemp a fist bump) "No man, NO!" (Knuckle reject!)

Knuckle reject by JERALDtc May 21, 2013

knucklet 

The smallest knuckle on you hand. The one you pinky is attached to. If you don't have a pinky knuckle your knucklet you next knuckle in ascending order from your pinky to your thumb

I was moving mattresses today and I got a blister on my knucklet.

knucklet by arandomname September 2, 2013

Knuckle Theory 

A theory used by measuring the number of days in a month. If your index finger touches your knuckle of your hands, the month has 31 days, while if you touch the skin of your fist, it has 30 (with the exception of February).

Scott: Dude, how many days are there in August?

Dave: 31.

Scott: Isn't it 30?

Dave: Use the Knuckle Theory.

Knuckle Theory by OpeN333 October 22, 2013

knuckle banging 

to fuck the shit out of someones knuckles

i just finished knuckle banging cody and shaine so hard

knuckle banging by muncherofallass April 21, 2014