What do People Mean When They Talk About a "Perfect Storm"?

@icesmile (7172)
Romania
July 17, 2009 6:11am CST
Time ago i read this words , and there don t was a very good description, was just few words about a perfect scenario about a a big catastroph,and nothing more. Who know what this words real mean, because i don t understand as expresion in English language.
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