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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. 2015.
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Examples from the Web for flabbergasted
Contemporary Examples
Historical Examples
  • I suppose that he, an astronomer, was twice as flabbergasted as the rest of us.

    The Holes Around Mars Jerome Bixby
  • If ever a poor devil was flabbergasted, it was the head of the Boyne agency at that moment.

  • “I only wanted to see the library,” stuttered Trix, flabbergasted, dismayed.

    Antony Gray,--Gardener Leslie Moore
  • Hilton smiled at the flabbergasted captain and went back to the lounge.

    Masters of Space Edward Elmer Smith
  • Uncle Henry was flabbergasted, completely done for, for the moment.

    The Bad Man Charles Hanson Towne
British Dictionary definitions for flabbergasted


(informal) overcome with astonishment; amazed; astounded


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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Word Origin and History for flabbergasted

1772, mentioned (with bored) in a magazine article as a new vogue word, perhaps from some dialect (in 1823 flabbergast was noted as a Sussex word), likely an arbitrary formation from flabby or flapper and aghast.

Online Etymology Dictionary, © 2010 Douglas Harper
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Slang definitions & phrases for flabbergasted



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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