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the combination of extreme exposure to heat, humidity, and sweat, that causes chafing around the buttock region. Can normally be supressed by applying medicated powder to the infected region, though relapses may occur due to fact that this disease has no cure.
Jimmy had a major case of Raw Ass Disease (R.A.D.) after his girlfriend kicked him out of her ride and made him walk 5 miles in the Georgia heat.
by Jake Thompson August 15, 2007
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