The hardest erection one can achieve. An erection so hard the head of the penis goes from a velvety matt to a high gloss finish, so red and full of rage that its almost purple, those creating a Purple Sheen off the head of the penis.
Tommy woke up with a Purple Sheen, his dick was so hard it he pushed down on it and popped his lower back.
by Nick Pitarra June 14, 2013
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