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Synonyms

nincompoop

American  
[nin-kuhm-poop, ning-] / ˈnɪn kəmˌpup, ˈnɪŋ- /

noun

  1. a fool or simpleton.


nincompoop British  
/ ˈnɪŋ-, ˈnɪnkəmˌpuːp /

noun

  1. a stupid person; fool; idiot

"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

  • nincompoopery noun
  • nincompoopish adjective

Etymology

Origin of nincompoop

First recorded in 1670–80; origin uncertain

Explanation

Calling someone a nincompoop is like calling them a fool, idiot, bonehead, or dope. It's definitely not a compliment. Nincompoop is a silly-sounding word that's also kind of old-fashioned, like ninny. No one has any solid idea where it came from, and anyone who claims otherwise is, well, a nincompoop. By definition, nincompoops are dumb, foolish, and can't do anything right. But there are far worse things you could call someone who's behaving like an idiot. Maybe this old-timey insult deserves a revival?

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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.

Tom was of course not a nincompoop, but a serious, thoughtful person who hungered to add substance to sketch comedy.

From Los Angeles Times • Dec. 29, 2023

I guess I want someone to tell me that it’s possible that I’m a nincompoop here and that straight men can “sound gay.”

From Slate • Apr. 9, 2020

Higher courts, and history, ultimately vindicated John Sirica’s belief that he shouldn’t be “sitting on the bench like a nincompoop and watching the parade go by.”

From Washington Post • Dec. 18, 2018

Pretty soon the goal is sinking each other, proving once and for all that the other person is a complete nincompoop.

From Salon • Jan. 6, 2017

Andrew wasn’t a nincompoop, as you will very soon see.

From "Mary Poppins" by P. L. Travers