Thanks HCBando. I made an assumption the term was similar to stolen valor where a person who is not from a disadvantaged background takes advantage of provisions made for people who are. Imposter syndrome actually resonates because sometimes we limit our own advancement because we don't think we are capable or worthy. Nice to put a name to an age old feeling.
I read up on it (I too thought it might describe fake minority claims that somehow damaged real minorities via cultural appropriations, etc.) and apparently it initially described an acute feeling among women especially in academic and business settings. More recent research notes the feeling also applies to everyone at one time or another.
Many of my graduate counseling students reported experiencing this when they started their first jobs. They felt upset because they were not sure they were up to the tasks they sere being assigned. It actually comes from a good place - wanting to help a student/client to the east extent possible to address whatever issues they were facing. Having a mentor is an excellent way to help address this.