noun. See 'Barking Moonbat'.

Moonbat (also "barking moonbat") is a term often used as a political epithet. Some Iraq War supporters use it to insult opponents like Noam Chomsky and Pat Buchanan. More generally, it is used as a pejorative for extremists, especially those who believe in conspiracy theories.

an increadibly stupid person, like a polititian who won't shut up

a batty left-winger whose head is positioned in the part of the body used for mooning