Supposedly, it's a mutation that gives you purple eyes at puberty, no hair, and for women, fertility without menstruations.
The origins appear to be invented in some fan fiction. There's no reference to it in Google Scholar, which covers abstracts from a huge number of scientific papers.
Cameron Miquelon claims to be the original author in about 1998, and is frustrated by people who can't tell the difference between fiction and fact:
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