A rapid interest in something followed by an immediate loss of interest; a short lived trend.

Metaphorically, like the Doppler Effect: sirens coming closer and getting louder, and then decreasing just as quickly.
Guy 1: What ever happened to the guy that did that song Gangnam Style?

Guy 2: American interest in a Korean pop star? Total siren slide...
作者 Duckspeak Begone 2012年10月05日

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