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Female masterbation, involving rubbing the clit.
"I'm so horny, i'm about to rub the nub right here."
by FemmeFatale June 23, 2005
The Act Of Male Masturbation Involving a Choad.
I used to think he jacked off but now since he has a choad he just rub the nub!
by TheCorgasm July 02, 2009