Elmo effect
 n.— «People were referring to it as the “Elmo effect” because it got people into the stores way ahead of what is normally seen as the kickoff to the holiday shopping season.» —“Hot-selling US toy Elmo was well-kept secret before debut” in East Aurora, New York International Herald Tribune (Paris, France) Dec. 19, 2006. (source: Double-Tongued Dictionary)

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