ZEITGEIST Mularbora?

I'm curious about this term used to describe Nilasa Hume. As far as I can tell, it occurs only in her criminal file handout; and by "only" I not only mean nowhere else in all of Zeitgeist, but nowhere else on Earth, or at least those parts of the Earth searchable by Google. Is it a local term for half-elves, or for hybrids in general, or...?