... kopi luwak, the coffee that is "processed" in the digestive tract of a civet cat (usually Paradoxurus hermaphroditus). These animals (found in southeast Asia and related to mongooses, although they look and behave a bit like raccoons) eat ripe coffee berries. Stomach enzymes have a subtle but apparently genuine chemical impact on the coffee beans, which are gathered as soon as possible after being passed by the civet, e.g., in the scat.
I happened to notice this blog, Coffee and Conservation, via Treehugger, the aptly named environmental blog. Coffee and Conservation has a not-so-glowing review of the unusually processed coffee. I've heard of kopi luwak for a couple of years, and generally consider it to be a bit like other gimmick foods. It's something I wouldn't drink, much like I wouldn't eat haggis or hakarl. (No offense to the Scottish or the Icelandic, but when even a Pole finds part of your national cuisine to be disgusting, you've got a problem. I mean, good lord, we eat pig's feet.) But, if you're the sort that likes to say you're badass because you've eaten mouldy shark's meat, intestine-wrapped-in-stomach, or catshit coffee, well... have at it.