A crusty knuckle is when you have your girl stimulate your prostate by shoving her middle finger up your anus. Look at her knuckle once she is done.
by John Chapman June 1, 2007

by Jerktog October 13, 2023

by Dicdaily January 11, 2018

by CurseWordGenerator2000 January 28, 2019

by Snykes April 23, 2018

by Marty's ass September 25, 2020

when a dudes' slacks are so tight they squeeze his twig and berries into a rhino beetle head shape to make them protrude like a ball-dick boner from said slacks; you know, grab a bowling ball with the correct grip (hand palm up, pointer and middle finger curved up and middle finger curved down, ring finger and pinky tucking into palm. pointer and middle finger would be balls shooting forward and up and thumb would be chub chub jutting forward and down.) now you see it, bro? ;)
Dude, i love Led Zeppelins music, but can't stand seeing old video footage of them. Every time they have wicked saba knuckle.
by SHAQattaQ September 5, 2014
