Topsy-Turvy (upside-down) is a state of utter disorder or confusion: in a topsy-turvy manner, turned or positioned upside-down; inverted.
Kaynak: Topsy-Turvy (disambiguation)

Gilbert, who wrote the words, created fanciful "topsy-turvy" worlds for these operas where each absurdity is taken to its logical
Kaynak: Gilbert and Sullivan