Definition of "fathead" [fat•head]

• Slang A stupid person. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The old fashioned term "fathead" describes Tom Watson to perfection."
• "And don't think I'm the kind of fathead who tries to fend off lightning with his fists, either."
• "As for Taft being a "fathead," his head was indeed as "fat" as his famously huge ass."