A slow-witted, unresponsive, or inept person (usually male).(noun)
A recruit who is unintelligent or difficult to train.(noun)
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Use "numbnuts" in a sentence
"By Saturday, TNT's Charles Barkley, perhaps frazzled, used words not normally heard on-air — like calling TNT's Kenny Smith "numbnuts" and saying something similar about his producer."
"But I really have to wonder what kind of numbnuts we have in Washington who conclude that you should be allowed to get 15 days of medication every 30 days."
"Also 'Pedant', aka "numbnuts", the short history of the Union does not invalidate it."