I always liked Felgercarb, from Battlestar Galactica. My understanding of Donnerwetter is that it's really much stronger to German-speakers, kinda like MF is to English speakers. So, for an Austrian, Donnerwetter would be an excellent choice. Do we have any German speakers to chime in on this? Oh, and Shugana sounds like Meshuganah - which I believe is Yiddish like Furschlugginer. Thinking about it, that would be a good term for a German speaker - Mad Magazine used it all the time as I recall.