1)Have you ever encountered this phrase? I have not. I tried looking it up in various slang dictionaries and it seems that Marshall might have made it up.
2)If you have never seen/heard this phrase before, what do you guess that it means? Again, I am not sure. The only analogy I know of is people talk about "fractional ownership" of private jets. The fraction could be quite small.
3)Do you consider this to be a strong, weak or backfiring item of praise? I am wondering why Marshall would think "fractional billionaire" to be stronger than "multi-millionaire" or #X on the Forbes list of richest people in the world. To me, partly because it's an unfamiliar term and partly because a "fraction" has a connotation of belittlement, it comes across as extremely weak praise.
Thanks in advance for your input and insights.