Hottentotenpotentatenstantenattentäter (n.): One who assails the aunt of a Hottentot potentate. It may have the greatest scansion of any German (or faux-German) word I’ve heard to date:

I am the very model of a modern major general
I Hottentotenpotentatenstantenattentäter all

(Discovered at http://olimu.com/Journalism/Texts/Commentary/Ethnonymy.htm)