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.