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1.
To Rev the crowd is an action that is preformed at a concert by the lead singer (most likely).
To get the crowd at a show more rowdy, a band member may rev the crowd by placing both hands in the air above his head (like riding a chopper bike) and like you would do on a motorcycle to rev the engine, you twist your hand up and down.
by doodxor July 21, 2003
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