Male version of the Camel Toe. When a mans pants are so tight it seperates his testicles individually from an outside view looks like a pair of Buck Knuckles. Also known as Moose Knuckles. Robert Plant is famous for his buck knuckles.
by Justin W November 10, 2007
Wet substance remaining in the anus. Can be caused by lubricants, semen and even crap from a poopdick.
by Justin W September 29, 2005