Yahoo

google

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mid 18th century: from the name of an imaginary race of brutish creatures in Swift's Gulliver's Travels (1726).

wiktionary

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From Gulliver's Travels by Jonathan Swift, where Yahoo is the name of a race of brutes. [1]

Expressive.

From Yahoo!.

etymonline

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yahoo (n.)

"a brute in human form," 1726, from the race of brutish human creatures in Swift's "Gulliver's Travels." "A made name, prob. meant to suggest disgust" [Century Dictionary]. "Freq. in mod. use, a person lacking cultivation or sensibility, a philistine; a lout; a hooligan" [OED]. The internet search engine so called from 1994.