Thanks for all the thoughts so far PPRuNers. Excellent points well made Genghis, Chevron, IFMU and Biscuit, maybe "yellow Piper" or "blue heli" is the way to go?
Abrahn, the DG400 pilot would of course call "motorglider CD". It would be ridiculous to call 'Ventus' or 'Discus', all modern single seat sailplanes are essentially indistinguishable at any range.
My primary point is that IMHO "Golf" does literally nothing, and yet everyone uses it.