Sentence:  This then leads to Elaine&#39;s entrance into what Jerry describes as a “<WSD>Bizarro</WSD> world,” citing the Superman concept, in which all of the facets of the show as we know it, especially its principlesic characters, are reproduced in some way backward. 
Meaning of the word marked with <WSD> tags:  Being the opposite or logical inverse of a familiar object or person.