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
Even though I got my PhD, I ended up as an unemployed doctorate holder.
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.
He is currently continuing his research at the university as a postdoctoral fellow.