When an individual succombs to the pressure of fear, anger, and/or insanity and begins taking out people or groups of people with cunning tactical ninja like efficiency.
Margaret went on a ninja rampage after missing a deadline at work as she stealthfully cut off every driver within a 2 mile radius down i-5 before catching up to her boss and ran him into the ditch.
by nehlewolf April 22, 2011

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