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Can be used to define when the popularity of a product or service gains momentum to another product due to the hype being switched over.
John: I'm using myspace right now it's the best.
Joe: No, you should use facebook because everyone is using that now.
John: Since everyone is using that I guess I will switch over then.

If people switch from Call of Duty to Battlefield 3 there is a popularity swing because all of their friends are playing that one game.
by Namynos June 22, 2011