bubblehead

bub·ble·head

 (bŭb′əl-hĕd′)

n.

A foolish or empty-headed person: "He presents antiwar protesters ... as bubbleheads who didn't even know where Southeast Asia was" (Frank Rich).

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bub′ble·head′ed adj.

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.

bubblehead

(ˈbʌbəlˌhɛd)

n

informal a frivolous person

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014