Top Definition
The almost viral phenomenon that occurs when Oprah endorses a cause or person or product. When Oprah announces her approval of something, its popularity will almost surely escalate to the point of frenzy.
First introduced by the cable news networks' 2008 Presidential election campaign coverage.
Woman # 1: "Did you hear that Oprah's backing Barack Obama for president in '08?"
Woman #2: "I'm voting for him. He's got the Oprah Effect."

Man # 1: "Now, how in the hell did Dr. Phil get his own show?"
Man # 2: "Must be the Oprah Effect, man."
by terribleDH December 23, 2007

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