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[flab-er-gast] /ˈflæb ərˌgæst/
verb (used with object)
to overcome with surprise and bewilderment; astound.
Origin of flabbergast
1765-75; variant of flabagast (perhaps flabb(y) + aghast)
Related forms
flabbergaster, noun
amaze, astonish, stagger, nonplus, confound; perplex, confuse, mystify. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for flabbergast
Historical Examples
  • And nothing has happened to astound or flabbergast him, to send him sprawling with Cheyne-Stokes breathing.

    Europe After 8:15 H. L. Mencken, George Jean Nathan and Willard Huntington Wright
  • But there had been no need, and Stockdale was too shrewd a man to "barge in" and flabbergast his youthful Sub.

    A Sub and a Submarine Percy F. Westerman
British Dictionary definitions for flabbergast


verb (transitive)
(informal) to overcome with astonishment; amaze utterly; astound
Word Origin
C18: of uncertain origin
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
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Slang definitions & phrases for flabbergast



To amaze; perplex; throw (1772+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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