yahoo

Etymology 1

From Gulliver's Travels by Jonathan Swift, where Yahoo is the name of a race of brutes.

noun

1. (derogatory) A rough, coarse, loud or uncouth person
2. (cryptozoology) A humanoid cryptid said to exist in parts of eastern Australia, and also reported in the Bahamas.
   1835, James Holman, Travels, quoted by Malcolm Smith, Bunyips and Bigfoots (Millennium Books, 1996, →ISBN), who notes that the Australian sense almost certainly derives from Gulliver's Travels, despite Holman's report The natives are greatly terrrified by the sight of a person in a mask calling him "devil" or Yah-hoo, which signifies evil spirit.
   1985, Michael Raynal, Yahoos in the Bahamas: Cryptozoology, volume 4:

Etymology 2

Expressive.

intj

1. An exclamation of joy or enjoyment.
   Yahoooooo! Give her some stick! 1959, Anthony Burgess, Beds in the East (The Malayan Trilogy), published 1972, page 521
2. A battle cry.

verb

1. To give a cry of "yahoo".

Etymology 3

From Yahoo!.

verb

1. (Internet, informal) To search using the Yahoo! search engine.
   Ah! You mean you have been 'yahooing'? I'm dead! 2007, Tell
   I searched, Yahooed, Googled and everything else I could. 2008, Frederick Thomas, Buddha's Bones, Buddha's Bones, page 46
   In other words, none of our googling and yahooing is private (you knew that, right ?). 2017, Rajendra Pillai, Unearthed: Discover Life as God's Masterpiece, New Hope Publishers