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1.
An angry, invidious, regressive, hate-driven person who thrives on conflict and abhors anything intelligent, enlightening, factual, logical, rational, fair, balanced, liberal, progressive and non-passion-based.

A person who is driven by their passion-based beliefs and who hates sound intelligent reasoning.

i.e.,
Joe discovered that he could effortlessly rile a "neoconanderthal" by merely pointing out several, key, intelligent facts that proved to all that Sarah Palin was simply just not knowledgeable enough to ever be deemed a serious candidate in any future Presidential election.
by ZonaCat Hansen August 30, 2009