switcheroo
\swich-uh-ROO, SWICH-uh-roo\
noun
1. an unexpected or sudden change or reversal in attitude, character, position, action, etc.
Quotes
Shiny screeners arrive, harbingers of the new season, and you let folks know what looks promising. Then suddenly the Whitney-created show you loathed gets better, while the Whitney-created show you defended gets worse. Or you go through some psychic switcheroo and recognize the genius in a series that you’d severely underestimated.
-- Emily Nussbaum, "Hate-watching 'Smash,'" The New Yorker, April 27, 2012
Origin
Switcheroo came to English in the 1930s. The suffix -eroo is used to create familiar, usually jocular variations of semantically more neutral nouns, like switch.
Dictionary.com
