It started out as “Jerry’s Guide to the World Wide Web” then received a new name. The name Yahoo! supposedly stands for “Yet Another Hierarchical Officious Oracle”, but the founders insisted that they chose the name because they liked the term’s general definition from a book.
The word was invented by Jonathan Swift and used in his book Gulliver’s Travels. It represents a person who is repulsive in appearance and action and is barely human. Yahoo! founders Jerry Yang and David Filo selected the name because they considered themselves yahoos.