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when gangstas or male occupants of a car place their arms out of the windows while checking out bitches or marking turf. their arms extend out of the window giving the effect of their knuckles dragging on the road. knuckle dragging is usually performed on friday or saturday nights in a pimp ride.
Marty: lets roll in your car man and check the main drag

Ryan: you love knuckle dragging dude, its wednesday afternoon.

Marty: you dig it the most. i just wanna see some skirt.
by gerard jacques March 18, 2011
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