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1.
When the hair on your balls get all twisted up and knotted and it starts to pull on yourscrotum in a such a manner as to cause discomfort.
Often requires rather obvious pulling of the pants in the testicle area in an attempt to untangle the ball-hair.
Joe:Yo dude, why yo all walking all sketchy and shit?

Bill:Shit man, I got some serious nut knots goin' on, it like my balls be all bein' pulled on and shit.
by Kronen V May 07, 2010