variants or nut case
plural nutcases or nut cases
: a foolish or eccentric person
My mother had been making fun of Grandpa for years, calling him a nut case and his stories exaggerations, if not outright lies. Don Wallace
also, sometimes offensive : someone who is not mentally sound

Examples of nutcase in a Sentence

some nutcase was arrested for running out onto the baseball field while the game was in progress around the condo complex she's known as the nutcase who consistently ignores the rules
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Although My Donkey, My Lover & I (Antoinette dans les Cévennes) was made in 2020, before Libs of TikTok exposed school-teacher lunacy, writer-director Caroline Vignal proves prescient about the eccentricity that goes deeper than the profession’s nutcase radicalism. Armond White, National Review, 27 July 2022 Ma Seok-do (Ma) is still with the Geumcheon Police Major Crimes Unit, arriving to help his fellow officers deal with a knife-wielding nutcase who’s taken hostages at a corner store. Dennis Harvey, Variety, 3 June 2022

Word History

First Known Use

1955, in the meaning defined above

Time Traveler
The first known use of nutcase was in 1955

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Cite this Entry

“Nutcase.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nutcase. Accessed 28 Feb. 2025.

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