noun
unemployed PhD holder
Wasei-eigo term for a person with a doctorate who cannot find a stable academic position, often working part-time or unemployed. Carries a negative nuance about the academic job market.
wasei-eigo (Japanese-coined English), from over doctor
博士号を取ったのに、オーバードクターになってしまった。
Even though I got my PhD, I ended up as an unemployed doctorate holder.
noun
Used in Japanese to refer to a postdoctoral researcher, though the English term 'postdoc' is also common. This sense overlaps with the first, but focuses on the temporary research position rather than unemployment.
彼は今、大学でオーバードクターとして研究を続けている。
He is currently continuing his research at the university as a postdoctoral fellow.