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knucklehead

American  
[nuhk-uhl-hed] / ˈnʌk əlˌhɛd /

noun

Informal.

  1. a stupid, bumbling, inept person.

knucklehead British  
/ ˈnʌkəlˌhɛd /

noun

  1. informal 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

  • knuckleheaded adjective

Etymology

Origin of knucklehead

First recorded in 1940–45; knuckle + head

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.