From Longman Dictionary of Contemporary Englishyahooya‧hoo1 /jɑːˈhuː/ interjection spoken informal shouted when you are very happy or excited about somethingyahooyahoo2 noun (plural yahoos) [countable] old-fashionedRUDE/IMPOLITE someone who is rough, noisy, or rude a bunch of time-wasting yahoosYahoo!Yahoo! trademark a type of search engine (=a computer program used for searching for information on the Internet), which also provides other information such as news, city maps, and shoppingOrigin yahoo1 (1900-2000) From the sound of a happy shout yahoo2 (1700-1800) From the name of a race of human-like animals in Jonathan Swift's Gulliver's Travels (1726)
