Toes Up Meaning

(idiomatic, slang) broken, completely failed so as to become inactive

Example: 1862, Charles James Lever, Davenport Dunn‎‎, page 119:
  Groves, of the Forty-sixth, is gone "toes up".
2005, Mo Hayder, The devil of Nanking‎, page 42:
  The land deals in Tokyo've gone toes up since the bubble burst, but the landlord's still trying to push through a deal with a developer.