An individual that may have balls but is unable to use them as they are redundant, or duds.
"Hey, watch where you're going"
"and what are you gonna do about it, Rubbernuts!?"
by Tom Niessen April 24, 2006
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When a girl rubbernuts (rubs nuts) a guys balls.
Sally went rubbernutting at Jims house.
by MotherNutter August 1, 2017
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