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Usually offensive term referring to a person of a race further behind in evolution, pertaining to the fact that humans evolved from knuckle walking apes, and to the generalisation that all of these people walk with a gangsta style hunched-over gait with arms dangling towards the ground.

Also refers to the species of apes which walk using thier
feet and knuckles.
Hello city zoo? I'm not sure whether to call you or the police about this bunch of knuckle walkers who claim to be a gorilla unit or g-unit that is terrorising the local civilised people with their savage behaviour.
by Frank Rizzeaux September 17, 2007
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