augean stable

from The Collaborative International Dictionary of English v.0.48
Augean \Au*ge"an\, a.
   1. (Class. Myth.) Of or pertaining to Augeus, king of Elis,
      whose stable contained 3000 oxen, and had not been cleaned
      for 30 years. Hercules cleansed it in a single day.
      [1913 Webster]

   2. Hence: Exceedingly filthy or corrupt.
      [1913 Webster]

   {Augean stable} (Fig.), an accumulation of corruption or
      filth almost beyond the power of man to remedy.
      [1913 Webster]
    

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