toes up

adjective2

1. •
   (slang) Of a person, dead or killed.

   • Groves, of the Forty-sixth, is gone "toes up". — 1862
2. •
   (slang) Broken, completely failed so as to become inactive.

   • 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. — 2005