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scooby doo

noun
  1. rhyming slang a clueI don't have a scooby doo what you're talking about Often shortened to: scooby
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Word Origin

C20: from Scooby Doo, a cartoon character on children's television
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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