moonbat

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moonbat

/ˈmuːnˌbæt/

Where it comes from

From moon + bat. Originally the name of the XP-67 experimental aircraft, developed by McDonnell Aircraft in 1941. Used in the 1940s by the science-fiction writer Robert Heinlein, then used in the term “barking moonbat” coined in 1999 by Perry de Havilland of “The Libertarian Samizdata”, a right-libertarian weblog. This originally referred to both left-wing and right-wing crazy people. Sometimes wrongly claimed to be a corruption of Monbiot (from George Monbiot, British environmentalist and Guardian columnist).

noun moonbats

derogatory, informal A liberal (someone with a left-wing ideology). So, what do moonbat professors do when they're not attacking military recruiters, the Bush administration, cameramen, and College Republicans?
Similar: leftard, libtard

adjective more moonbat · most moonbat

derogatory, informal (of ideas) Absurd or obviously untruthful. 20204: The Bulwark Trump, who said last month at the Republican National Convention that he would never again retell the story of the attempt on his life “because it’s too painful to tell,” told that story with relish. He expounded at length on his usual moonbat fables about how countries around the

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MLA

"moonbat." Wiktionary, via Micwyn, micwyn.com/word/moonbat. Accessed 6 Nov. 2026.

APA

moonbat. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/moonbat

Chicago

"moonbat." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/moonbat.

BibTeX

@misc{moonbat_2026,
  title = {moonbat},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/moonbat},
  urldate = {2026-11-06}
}