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noun Informal.
  1. a thick or sticky substance: Wash that goo off your hands.
  2. maudlin sentimentality.
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Origin of goo

1910–15, Americanism; perhaps short for burgoo
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for goo


noun informal
  1. a sticky or viscous substance
  2. coy or sentimental language or ideas
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Word Origin

C20: 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

Word Origin and History for goo


1903, American English, of obscure origin, probably a back-formation from gooey.

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Online Etymology Dictionary, © 2010 Douglas Harper