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dog-tired

[dawg-tahyuh rd, dog-]
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adjective
  1. utterly exhausted; worn out.
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Origin of dog-tired

First recorded in 1800–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for dog-tired

dog-tired

adjective
  1. (usually postpositive) informal exhausted
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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