An intellectually challenged person.
Although the term would seem self-explanatory, it has no relation to a scrotum condition whatsoever. (not even from standing waste-deep in a gelid water!!!)
In many a case, Russian private soldiers invading Czechoslovakia in 1968 were numbnuts. The hey I dont know how to work the tap I guess I will just use the force of a hammer to make the water run out of the wall ones
by scribblerus August 22, 2006
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noun. A medical condition whereby the sufferer has restricted blood flow to the genital region due to having their head jammed up their own ass; expresses most frequently as a mental disorder, and, ironically, seems to have no limiting capacity on the reproductive qualities of the sufferer, frequently quite the opposite affect has been observed.
Person #1: "Goddammit! Why isn't this idiot turning right at this red light, there's nobody in his way?"

Person #2: "He's obviously a numbnuts."
by The Opster January 31, 2010
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"num nutz"
1. a person or persons that possess very little knowledge, common sense, or skills.

2. Erik W. Heftie
by eric h August 9, 2003
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This word originated in the U.S, however, it's used in the U.K. as well. Most likely its use was born in the U.S. military, just as expressions like soup sandwich and jeep. Made popular in the movie, "Full Metal Jacket," when Hartman yells at Pyle.
"What is your major malfunction, numbnut?!"
by pedicabber April 23, 2005
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A person who lacks some combination of common sense, intelligence, manners, or coolness.
What is your major malfunction numbnuts? Didn't mommy and daddy show you enough attention when you were a child?
by Megaloman March 13, 2009
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A fucking moron. See fucktard.

Came to prominence after Austin Powers (I forget which one).
A trillion is more than a billion, numbnuts.
by The Beer Baron October 8, 2004
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