So what else is new? An expression of resignation and boredom. Possibly abbreviated for the first time by a grocery bagger in Melbourne, Florida, U.S.A. in 1985, it could have attained worldwide usage through United States Army service from 1986 - 1989.
Person A: It's raining outside.
Person B: Swein?
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The usage of a made up word or term in a way that meaning can be believed to be understood by the reader.
A prime example of the Swein-Vertikoff Effect was the usage of the term Swein-Vertikoff Effect.