Definition of "switcheroo" [switch•er•oo]

• Slang An unexpected variation or reversal. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "How would you react if your mate pulled a name switcheroo?"
• ": 3) Sudden ‘All your heroes are belong to us’ switcheroo is sudden and nobody in my circles predicted that one, so speculation around the LCS is making for some animated discussions."
• "Now, some of the modern IDists might have not known about the word switcheroo, or at least have plausible deniability although I suspect that everyone on the long list of reviewers at the front of the 1989 Pandas, which includes many modern IDists, must have seen and commented on pre-ID drafts of Pandas, even if they don’t remember it."