from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A stupid person; a blockhead.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun An idiot; a stupid or inept person

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a stupid person; these words are used to express a low opinion of someone's intelligence


Sorry, no etymologies found.


Help support Wordnik (and make this page ad-free) by adopting the word knucklehead.



Log in or sign up to get involved in the conversation. It's quick and easy.

  • chucklehead's twin brother

    August 25, 2007

  • A person of low intelligence. See Knuckle Up.

    February 12, 2008