What is Moon Bat?
1.
somebody who is crazy
That cat lady is a moon bat
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2.
a pathetic female hippie / femi-nazi
there nothing in this world more pathetic than an aging hippie dike, moon bat.
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3.
an attacked use mostly on the internet by people who can't grasp things outside of their belief paradigm. They get scared by possible evidence of things they can't grasp and reply with silly insults never actually addressing any facts.
Several astronauts and many many very reputable people have said UFO's are indeed real and the U.S. government is covering it up. Some say they've even seen them. Several U.S. Presidents have even seen them. They were photographed over the white house twice, both times with fighters being scrambled. These photots were on the cover of the washington post, yet Joe couldn't grasp this and recanted the point with. "well their just moon bats!"
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4.
A typical ad-hominem insult devised by conservative media personae. Used to smear politicians, actors, singers, community leaders, philosophers and regular citizens who speak out against any injustice carried out by any member of either the Republican party or any other highly conservative power. Basically, if you don't tow the party line completely or if you question the judgement of the President or Republican leadership, you're a "moon bat," (completely insane.)
Rush Limbaugh: Hillary Clinton is a moon bat! Howard Dean is a moon bat!
Some historical moon bats: Plato, John Locke, Thomas Jefferson, Samuel Adams, John Brown, Henry David Thoreau, Fredrick Douglas, Gandhi, Lincoln.