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1.
The noise Dr. Zoidberg makes while trying to escape (Futurama) normally accompanied by side running like a crab
Hermes: How scared should we be?
Professor: Somewhere between not at all and entirely

Dr. Zoidberg: I call entirely, Woop Woop Woop
by Dr. Zoid June 09, 2010
 
2.
1. a term used to express great excitement
My sexy boyfriend is coming to see me! Woopwoopwoop!
by Briannica November 06, 2004