Dictionary.com
Thesaurus.com
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

Derived Forms

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?

Keep Reading on Vocabulary.com

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.

A multinational corporation intent on protecting franchises that bring it more than $80 billion a year has thus far made its adversary look like a blustering nincompoop.

From Los Angeles Times • Mar. 30, 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

We can claim that he was just a nincompoop or a madman.

From "The Assassination of Brangwain Spurge" by M.T. Anderson and Eugene Yelchin

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "nincompoop" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com