Top definition
verb: a male who pushes his scrotum backwards between his legs, presses his legs together, bends over and spreads his buttocks with his hands, revealing both his scrotum and anus

also: to dump your sac, or: to butt-nut
Goody has been going around rear nutting everyone...they're all sick to their stomachs!!
by DubDubintheClub October 02, 2007
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