Kopi luwak (Indonesian [ˈkopi ˈlu.ak]), or civet coffee, is coffee made from the beans of coffee berries which have been eaten by the Asian Palm Civet (Paradoxurus hermaphroditus) and other related civets, then passed through its digestive tract. A civet eats the berries for their fleshy pulp. In its stomach, proteolytic enzymes seep into the beans, making shorter peptides and more free amino acids. Passing through a civet's intestines the beans are then defecated, having kept their shape. After gathering, thorough washing, sun drying, light roasting and brewing, these beans yield an aromatic coffee with much less bitterness, widely noted as the most expensive coffee in the world.
From 'Cat coffee' gets Halal green light, dated July 28, 2010:
Indonesia's top religious body has declared a premium coffee made from civet cat droppings fit for Muslims to drink.
If you want your coffee made by processing the beans through the digestive tract of the Asian Palm Civet (it's more like a monkey than a cat; ecologically, it's similar to a raccoon), order online (no fatwa is necessary).