Brooklyn-based “Ganngster” rapper KearneygaNNg releases new track “Ganngrene".. The track's name a reference to both his stage name and the ailment gangrene in a clever play on words. The track features a simple, pulsing bassline and artful repetition under KearneygaNNg’s rhythmic verses about life in the hood and his self-created “GaNNg.” Musically, “Ganngrene” is a twist on modern rap music that's being released.