From Wikipedia
The Tarzan yell is the distinctive, ululating yell of the character Tarzan, as portrayed by actor Johnny Weissmuller in the films based on the character created by Edgar Rice Burroughs, starting with Tarzan the Ape Man (1932). The yell was a creation of the movies, based on what Burroughs described in his books as simply “the victory cry of the bull ape.”
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[click on the image for Weissmuller’s famous “Tarzan yell”]