In Gulliver's Travels by Jonathan Swift, a Yahoo is a vile and savage creature, filthy and with unpleasant habits, resembling human beings far too closely for the liking of Lemuel Gulliver, who finds the calm and rational society of the Houyhnhnms far preferable. The Yahoos are primitive creatures obsessed with "pretty stones" they find by digging in mud, thus representing the distasteful materialism and ignorant elitism Swift encountered in Britain. Hence the term "Yahoo" has become synonymous with "cretin," "dinosaur," and/or "Neanderthal."
A Web directory created by a couple of guys from Stanford who now have more money than the entire state of Arkansas. Rumor has it they own one business suit between them. Their site is constantly updated and provides an easy way of finding almost any Web page. Check it our for yourself at www.yahoo.com.