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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1. A person of severely limited intellectual prowess, or extremely lacking in everyday common sense.

2. A viewer of FOX News, who only listens to a single news source, only communicates with others of his/her own political persuasion, and thinks "Tea Parties" are spontaneous outbursts of patriotism, without realizing they are instead, organized and funded by the richest people and corporations in America, with the intent to steal wealth from everyone. i.e. "Americans for Prosperity. "
1. "What a Numbnut! Can't he open his own mind? He thinks he's being patriotic, when in fact he's undermining the Constitution!"

2. "That Numbnut has no idea who's paying for those pre-made astro-turf signs being unloaded off that bus! What a Teabagger!"
by Correct_Guy January 1, 2010
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