Someone who's intelligence is less than or equal to that of your average caveman.
Wow, he really thought spending 803 Billion dollars we don't have was the way to fix the economy. What a knuckledragger!
by NO_Iwon'tpress1forEnglish September 01, 2010
Reminiscent of the hunched over cave man, with his arms to the ground. An insult used against those of extremely low intelligence, or general stupidity.

Also see low brow
Bubba is such a knuckle dragger.
by Matt September 29, 2004
A really dumb redneck, country bumpkin
Larry The Cable Guy ain't nothin' but a knuckledragger
by cartoonmayhem August 22, 2006
Military slang referring to infantry or Special Forces personnel, or paramilitary components of the US Intelligence Community.

The term stems from the common belief among the rear echelon and support personnel that Infantry soldiers are of generally lesser intelligence than support personnel.
The Liberty chow hall was full of knuckle draggers today, they smelled like B.O. and gun powder.

I had to catch a ride to the Green Zone with a platoon of knuckle draggers, and they made fun of my M16 A2 the entire time.
by cdangerd December 10, 2009
A malicious term used to describe a person of African American descent. The term is used to compare African-Americans to apes, since apes are known to walk using their knuckles.
All them knuckledraggers are the same, stupid as shit and using foodstamps.
by Mr. James Jonathon Peterson June 27, 2009
An individual, usually male, who lacks intelligence and/or culture.
The knuckle-dragger could not even name when the War of 1812 was.
by Tristan Reef October 22, 2007
Friendly jibe for a Snowboarder. Often given to snowboarder by a skier buddy.
Skier to Snowboarder: Hey knuckledragger , quit scrapin the snow off the trail.
Snowboarder to Skier: Outta my way 2-planker, snowboarders pwn this mountain.
by 07079 January 14, 2009

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