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dimwit

American  
[dim-wit] / ˈdɪmˌwɪt /

noun

Slang.
  1. a stupid or slow-thinking person.

    Synonyms:
    dumbbell, booby, numbskull, nitwit, dummy

dimwit British  
/ ˈdɪmˌwɪt /

noun

  1. informal a stupid or silly person

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of dimwit

An Americanism dating back to 1920–25; dim + wit 1

Explanation

A dimwit is a person who's not very smart. If you catch your friend sending a text message while he's driving, you can yell at him to put his phone down and call him a dimwit. No one wants to be called a dimwit, since it implies incompetence and a low IQ — it's important to use this word carefully to avoid offending someone. Still, when your brother leaves a pizza unattended in a room with his two big dogs, you'll probably have to say, "Well of course they ate it, you dimwit." The word was coined in the US, as 1920s college slang.

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Vocabulary lists containing dimwit

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

She had a Twitter tiff with the former president’s son last September; after Donald Trump Jr. made an online comment about Navarro’s weight, she called him a dimwit.

From Seattle Times Aug. 4, 2022

“Amadeus” serves Joseph no better than it does Salieri, portraying the ruler as a dithering dimwit.

From The New Yorker May 27, 2019

Mr. Leguizamo’s dimwit stance is unsustainable, in part because much of the history, despite the show’s premise, is actually quite familiar.

From New York Times Nov. 15, 2017

Eastwood has made violent films, arty films, heartwarming films and a handful of dimwit comedies.

From The Guardian Aug. 3, 2017

“Or perhaps I will mumble my way through my interview like a dimwit and be sent home again in shame,” she fretted.

From "The Incorrigible Children of Ashton Place: Book I: The Mysterious Howling" by Maryrose Wood

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