A person of such dim wittedness, that if you punch them really hard in the nads that they don't flinch.
by bikerspice July 10, 2003
A guy who's had his balls busted so many times he doesn't even feel it any more. Often mistaken for a perennial loser. This group is ranked among the lowest in the male social strati.
by Hobgoblin88 June 13, 2011
by jm999 January 14, 2007
The parents of the retarded boy decided to have him castrated when he was seen humping a dog. He is now a numbnut.
by Richard Black March 29, 2005
My mother, self-effacing comedian that she was, started to refer to herself as “Mrs. Numbnuts” as her cognition steadily declined.
by Dr Bunnygirl May 19, 2023