Switcheroo

A switcheroo is a sudden unexpected variation or reversal that is often associated with a joke (sometimes `the old switcheroo`). It is colloquially used in reference to an act of intentionally or unintentionally swapping two objects. As a comedic device, this was a favorite of Woody Allen; for a time, he used so many switcheroos that friends ref.....
Found on http://en.wikipedia.org/wiki/Switcheroo

switcheroo

[n] - a sudden unexpected switch
Found on http://www.webdictionary.co.uk/definition.php?query=switcheroo

switcheroo

noun a sudden unexpected switch
Found on https://www.encyclo.co.uk/local/20974

Switcheroo

Switcheroo is American slang for a surprising or unexpected change or variation.
Found on http://www.probertencyclopaedia.com/browse/ZSD.HTM
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