The Collaborative International Dictionary of English v.0.48:

Upside down \Up"side down`\, adv.
   in such a manner that the part normally pointed upward is
   pointed downward; same as upsidown and upsodown.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Upsodown \Up"so*down`\, adv. [Up + so as + down.]
   Upside down. [Obs. or Colloq.] --Wyclif.
   [1913 Webster]

         In man's sin is every manner order or ordinance turned
         upsodown.                                --Chaucer.
   [1913 Webster]