RORY: I’ve gotta head to school.
LORELAI: Hey, why go anymore? You’re in college. Let’s go truffle hunting or something.
Truffle, the fruiting body of a subterranean ascomycete fungus, predominantly one of the many species of the genus Tuber. Some truffle species are highly prized as food, and are considered a delicacy.
Truffles are cultivated and harvested in natural environments, usually growing close to tree roots. Because truffles are subterranean, they are often located with the help of an animal possessing a refined sense of smell. Traditionally, pigs have been used to extract truffles, but dogs can be used instead. Although dogs must be trained to hunt truffles, unlike pigs, they don’t have any interest in eating the truffles once they find them.
Truffle hunting is sometimes offered by truffle cultivators as a fairly expensive experience for people to enjoy and pay for. Such tours are most commonly offered in the Pacific North West of the US – in Oregon and Washington.
The Annotated Gilmore Girls 