What it means: The Unforgivable Curse of the rude words world. This person is not your friend. When to use it: Never. It's a really horrible word, even if you say that someone has a lovely C word, just don't say it. Okay, so maybe in the rarest and most necessary of cases. Where it comes from: Again, it's a word from Germanic and Scandinavian descent but it was also incorporated into place names. Groupecuntland (seriously, I didn't make that up) was essentially a red light district and Shavecuntewelle was basically a valley with a small woodland area; probably where we get the term lady garden from. But who would have known that the C word would be more acceptable to feminists than vagina?