Megawattage sound systems have blasted the electronically enhanced "riddims" and tongue-twisting lyrics of Jamaica's dancehall DJs across the globe. This high-energy "raggamuffin" music is often dissed by old-school roots reggae fans as a raucous degeneration of classic Jamaican popular music. In this provocative study of dancehall culture Carolyn Cooper, Professor of Literary and Cultural Studies at the University of the West Indies, Mona, Jamaica, offers a sympathetic account of the philosophy of a wide range of dancehall DJs: Shabba Ranks, Lady Saw, Ninjaman, Capleton, Buju Banton, Anthony B, Apache Indian. She demonstrates the ways in which the language of dancehall culture, often devalued as mere 'noise, ' articulates a complex understanding of the border clashes that characterise Jamaican society. Cooper also analyses the sound clashes that erupt in the movement of Jamaican dancehall culture across national borders.