Definition of switcheroo noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌswɪtʃəˈruː//
; NAmE NAmE//ˌswɪtʃəˈruː//
[usually singular] (informal)
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an act of exchanging or reversing something, especially in an unexpected way Meanwhile, her accomplice pulls a switcheroo, replacing the diamonds with paste-and-glass. Word Origin 1930s: from the noun switch + -eroo in the sense of ‘unexpected’.
See the Oxford Advanced American Dictionary entry: switcheroo