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An expression that is used in reaction to an extreme situation or something that depicts a "WOW" moment.
person #1: "Orphus!!"
person #2: "What does that mean?"
person #1: " Go look it up on Urban Dictionary"
person #2: Goes and reads definition
person #2: "Ja-WoW! That's crazy!"
by OooZa March 23, 2010
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