Definition of "sub-rosa" []

• Designed and carried out secretly or confidentially (adjective)

WordNet. Princeton University. 2010.

• "And why would you make even a sub-rosa racial appeal to Ted Kennedy?"
• "Negotiations, some of them sub-rosa, are part and parcel of doing business and establishing liasons with other naitons."
• "My spidey sense tells me there will be a sub-rosa accusation of anti-semitism."