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n. Slang
A stupid person.

fat′head′ed adj.
fat′head′ed·ly adv.
fat′head′ed·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


the quality of being fatheaded, stupidness
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Embrace essential fatty acids and reject fatheadedness.
(8) The breakdown of the big city machines due to fatheadedness and old age in office--Kelly in Chicago, Hague in Jersey, Prendergast in Kansas City, Tammany in NYC, only the Colorado organizations held up.