Definition of "woohoo" []

• Used to express sudden joy. (interjection)
• The sailfish. (noun)

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• "Crikit, Sparky & Ginger said ... sniffed over to wish ya'll a happy blogoversary! yummy cupcakes we'll be back again woohoo"
• "July 16, 2005 at 07: 55 AM love those eames chairs - lucky you! and the trip to spain sans children - woohoo is right!"
• "While others want to jump on the “citizen journalism” train – woohoo – the other story here for PR professionals (and bloggers) is that Alaska Airlines employees have gone nasty-comment-happy on Jeremy’s blog."