All you people never wondered what the Defenestration of Prague was about? That's a rather alarming level of incuriousity. My contribution is
septemfluous, a wonderful word for when you need to insult someone without insulting them. It means "flowing in seven directions (or streams)". Unless you hang out with geologists or Scrabble nerds, no one's likely to know it, and if you're decrying someone as having an overly cautious or vacillating nature, it can be an actual insult. But even when it's not, it definitely sounds like one. One of those words to roll around on your tongue for a while.
Oh, and another handy one, that comes with a free bonus story:
lapidation, which means "stoning", from lapid, or lapis (as in lazuli), which means "stone". Before I had my gall bladder taken out, my doctor talked to me about various procedures, one of which he referred to as "cholecystic elapidation", to which I immediately responded "No!", which rather surprised him. I pointed out that he probably meant "
delapidation", but that elapidation would refer to the front-fanged snakes. Delapidation would be removing stones; elapidation would be adding cobras, which would not help the situation.
Shiver Me Tits said:
Along similar Germanic lines: Backpfeifengesicht, in the words of Stephen Fry, "A face crying out for a punch in it."
Now I'm not familiar with Stephen Fry, so maybe there's a piece of context I'm missing, and my German is any case quite rudimentary, but wouldn't that be a face in need a slap, rather than a punch?