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Its African roots started in Harlem New York as a way of expressing something incredible insane.

People got tired of cray cray and ghetto valley girls abusing the word.

So crazy its mad but so mad it puts the zee in crazy. Madd zee.
Like those fools over there r wildin out..their "madd zee" yo..

She's madd zee if she thinks I'm going to do that.
by joey b brodskilla January 03, 2014