Plimpplampplettere?
kottke: "20 unusual non-English words sent in by readers of the BBC Magazine (in response to this article about a new book on unusual words). Plimpplampplettere, the Dutch word for skipping stones, is sublime."
I am Dutch, and I've never heard of the word. It doesn't sound like
anything any sane person would say, either. And the Dutch dictionary Van Dale doesn't know the word, so I'm pretty sure it doesn't exist.