'Upsidown' definitions:
- Upsidown \Up"si*down`\, adv.
See Upsodown. [Obs. or Colloq.] --Spenser.
[1913 Webster]
- 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]
