"Holy cow! That is the biggest slack knuckle I've ever seen!"
"That guys pants are so tight his slack knuckle is poking out like crazy."
"That guys pants are so tight his slack knuckle is poking out like crazy."
by Jadder Obbins July 7, 2008
Get the slack knuckle mug.When a man is wearing tight pants and the crotch seperates his testicles showing a bulge on each side of the seam.
by Otis The Duke January 26, 2009
Get the Sack Knuckle mug.Related Words
by Ms. Vegas May 26, 2016
Get the knuckle sack mug.