Meaning of Augean stables

Auge'an sta'bles

Pronunciation: [key]
— Class. Myth. Class. Myth.
  1. the stables in which King Augeas kept 3000 oxen, and which had not been cleaned for 30 years. The cleaning of these stables was accomplished by Hercules, who diverted the river Alpheus through them.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.