D defs.my
Entry 2 senses Webster, 1913

Augean

· Au·ge·an · IPA /ɔːˈd͡ʒiːən/
01 a. 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 …
  1. 1.
    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.(Class. Myth.)
  2. 2.
    Hence: Exceedingly filthy or corrupt.
Phrases & compounds
Augean stable — an accumulation of corruption or filth almost beyond the power of man to remedy.