A sexual act involving sticking ones fingers and or fist inside a persons anus while singing any John Denver classic while specifically "Leaving on a Jetplane".
by Doug Donna November 19, 2010
 Get the Denver Knucklemug.
Get the Denver Knucklemug. dave: yo heard about your fuck game breh
al: whachu mean
dave: you got a straight puppy knuckle for a dick mayne
al: whachu mean
dave: you got a straight puppy knuckle for a dick mayne
by deuces mcshmitiggle July 29, 2014
 Get the puppy knucklemug.
Get the puppy knucklemug. by pink pig August 21, 2007
 Get the knuckle rocketmug.
Get the knuckle rocketmug. a drink served in gay and lesbian bars made of peach schnapps and wild turkey stirred with a hairy finger
by zippofish January 19, 2013
 Get the Fuzzy Knucklemug.
Get the Fuzzy Knucklemug. Ugandan Knuckles can go to hell
by aertyu May 9, 2018
 Get the Ugandan Knucklesmug.
Get the Ugandan Knucklesmug. by upsetguy February 4, 2010
 Get the meat knucklemug.
Get the meat knucklemug. 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 December 3, 2007
 Get the buck knucklesmug.
Get the buck knucklesmug.