switcheroo definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Slang a sudden or unexpected shift or change, often a deliberately deceptive one
Origin: switch () plush -eroo
switcheroo definition by American Heritage Dictionary
noun pl. switch·er·oos Slang
An unexpected variation or reversal.
Origin: Alteration of switch.