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1.
A left winged nut is someone that is a liberal extremist.

There are somebody that is overly vocal about their opinion, and is confident that it is the correct one.
Many people refer to Al Gore as a left-winged nut, especially after his controversial movie, "An Inconvenient Truth," where he skews data pertaining to the effect of Global Warming.
by Justanothergal November 18, 2010
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