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A group of people that usually go around tagging,rapping,fighting,or stealing.
Usually found in big groups and always looking for trouble or a fight.
Or the laid back crowd of people.
But the term Gnarly Kidz originated in Cleveland.
Look At Those Gnarly Kidz Over There I Dont Want Trouble With Them.

Those Gnarly Kidz Over There Are Pretty Cool People.
by Juice Boy July 16, 2012
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