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The grandest of grand of all random exclamations, denoting the general "awesomeness" of the current situation one finds oneself in; although as exclamations often go, it can be used in just about any social situation.
J: "G'day, I got off a perfect score on my SATs, won the lottery and found a heads-up penny on the side-walk."

T: "Fwacha!"
by Phrexian9 March 14, 2007
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