In pre-
Crisis DC Comics continuity, Htrae, the world created by
Bizarro as a home for himself and others like him. On Bizarro World, things are the opposite of the way they are on
Earth: the planet is cube-shaped, everyone has powers like
Superman (except Bizarro-
Lois), banks give money away, newspapers print only lies (hmmm...), and so on. First appeared in
Action Comics #263.
The term has come to refer to any situation where things are the opposite of the way common sense dictates they should be.