Word.ws English Dictionary

moonbat

/ˈmuːnˌbæt/

moonbat noun: a liberal (someone with a left-wing ideology).

Noun

moonbat (plural moonbats)

  1. (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?2005, Michele Malkin, Unhinged: Exposing Liberals Gone Wild, Washington, DC: Regnery, →ISBN, page 108
    • As nervous Bush supporters watched the president's approval rating slide, they unleashed their wrath on Sheehan, labeling the mourning mom a “crazy,” “anti-Semite,” “left-wing moonbat,” “crackpot” whose behavior bordered on “treasonous” and who was nothing more than a “hysterical noncombatant.”2006 May 11, Eric Boehlert, Lapdogs: How the Press Lay Down for the Bush White House, New York: Free Press, →ISBN, page 216
    Synonyms:
    leftard, libtard

Adjective

moonbat (comparative more moonbat, superlative most moonbat)

  1. (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...

Synonyms of moonbat

Forms of moonbat

Noun
pluralmoonbats
Adjective
comparativemore moonbat
superlativemost moonbat

Origin of moonbat

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).

Words formed from moonbat

Questions about moonbat

What does moonbat mean?
Moonbat means a liberal (someone with a left-wing ideology).
What part of speech is moonbat?
Moonbat can be a noun or an adjective.
How do you pronounce moonbat?
Moonbat is pronounced /ˈmuːnˌbæt/.
What is the plural of moonbat?
The plural of moonbat is moonbats.

Words near moonbat in the dictionary

  1. moonballed
  2. moonballing
  3. moonballs
  4. moonbase
  5. moonbases
  6. moonbat
  7. moonbath
  8. moonbathe
  9. moonbathed
  10. moonbathes
  11. moonbathing

Source and license

Adapted from Wiktionary: moonbat (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “moonbat.” Word.ws, https://word.ws/moonbat. Based on Wiktionary, CC BY-SA 4.0.