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When you experience something so exciting, or out-of-this-world, that you just can't find the right words to say at the time to express how you feel.

This saying can be used when: a hot chick in a bikini passes you by, you've just seen a ghost, you just heard that you won the lottery, etc.
Guy 1: "Check out that babe with the huge tits in the bikini"
Guy 2: "hamana-hamana-hamana"
by The Guy June 14, 2006
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