A woman with big pussy lips - in small clothing looks like she's got a mans package.

Also refers to an ugly vagina. The more beat up the vagina is the more it looks like a mooseknuckle. Loose vagina
Aaron: does yana have a cock?

Rob: naw, shes got some huge coochie flaps aka Mooseknuckle

Aaron: wtfh??

Rob: her shit is loose - beat the fuck up!

Rob: her shit is as big as her forehead

Aaron: word
by Nontoxic March 31, 2010
The bump or bulge seen when a man wears tight pants.
"Is that a moose knuckle I see; or do you have a raisin in your pants?"
by the dude1963 April 20, 2013
The guy version of cameltoe.
Hey... look at that guys, Moose Knuckles... Gross!
by Nastynae June 09, 2009
A male style of a cameltoe
Nick was watching porn and he stood up and has a mooseknuckle
by Tugginmypudda September 04, 2010
when an obese lady has camel-toe
that camel to is so big its like a moose knuckle
by bob joe's May 07, 2012
When a man has a camel toe because he's wearing something really tight.
Mark proudly showed off his huge moose knuckle in his red bike shorts.
by charlesramsey August 06, 2013
A very noticeable bulge beneath a tight clothed males waist line, more popularly known as a hard on or erection. Due to the restricted room for the dicks extension, it fails to fully protrude outward, thus, remaining hindered and resembling an intriguing mound-shaped growth instead. Women have camel toes and men have moose knuckles (which is actually pertaining to the knee on a moose).
"Oh my GOD girlfriend, did you see the size of that moose knuckle that guy was carrying around under his speedo?"
by teenez69er August 22, 2014

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