/ ˈjɑːhuː; NAmE ; jəˈhuː/ noun , exclamation
■ noun
( pl. -oos ) ( disapproving ) a rude, noisy or violent person
■ exclamation
/jɑːˈhuː; jæˈhuː/ ( informal ) used to show that you are very happy :
Yahoo, we did it!
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WORD ORIGIN
noun mid 18th cent.: from the name of an imaginary race of brutish creatures in Swift's Gulliver's Travels (1726).
exclamation natural exclamation: first recorded in English in the 1970s.