multi-hyphenate n. a person who has (or is known for having) several main occupations. Also attrib. Editorial Note: Thanks to Michael Hobson for suggesting today’s entry! (source: Double-Tongued Dictionary)
Further reading
In this bonus A Way with Words minicast, Martha and Grant explore the ways foreign place names transform on official maps and in local slang. Discover the stories behind names like “Picketwire” and “Key West,” showing how history and mishearings...
Wendy from Charlotte, North Carolina, was baffled when a co-worker asked, Are you ready to race for pinks? The phrase racing for pinks refers to participating in car races where the winner gets ownership of a car, the pinks referring to the pink...
Although I know of no citations, it seems the term could also be applied to people of multiple ethnicities—for example, a Scotch-English-Mexican-American.
I did find a couple instances of similar hyphenates to what you describe, but only two—not nearly enough to substantiate an alternate sense for the term.
Many moguls are considered multihyphenate. The term is a euphemism for a successful jack of all trades and can be applied not just in professional but also in personal life. I consider myself a multihypenate professionally on a small level in that I can pigeon hole what I do as a Consultant very easily. (See http://www.multihyphenate.com)Personally, I also consider myself a multihyphenate best explained by the logo at http://www.momsoup.com with additions of amateur artist along with other specific personality traits. To me everyone is a multihyphenate in their own way
oops, I meant to say that I CAN’T pigeon hole what I do as a Consultant very easily.