Ramdas likely has the correct interpretation given the Oracle forum, but even a casual search of the term shows a wide variety of "definitions".

Frankly, when I saw the topic header what immediately popped into my head was something akin to "accidental DBA" in the sense of someone who isn't (or wasn't) necessarily a DBA by trade but is now "functioning" in the role because they're good with data and their company can't afford/doesn't want to hire a career DBA.