Someone with a rampant [Jew fetish] who dates people specifically because they're Jewish. Commonly, the Jewdigger's target will have a keen business sense, curly hair, glasses, and a big nose.
> "Ryan is such a Jewdigger that he goes to temple to meet girls ...and he's Roman Catholic!"
> "When that Jewdigger Ryan found out I was only half Jewish, he dumped me for my Israeli cousin."