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Someone who thinks he is smart but is actually very stupid. A "know-it-none" as opposed to a "know-it-all". In particular, people who assume their success in one area entitles them to respect in another. (etymology: a portmanteau of the words "asinine" and the name of the bona fide genius "Albert Einstein" - coined by former Jeopardy! writer Ryan Hopak.)
"Glenn Beck spews so much bullshit he's the ultimate asininestein.", "The character Cliff Clavin on the sitcom Cheers was an asininestein."
by Corpania October 07, 2009
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