First Known Use: circa 1924
Dictionary
yoo–hoo
interjection \ˈyü-(ˌ)hü\
—used to attract someone's attention or to call out to someone
Full Definition of YOO-HOO
—used to attract attention or as a call to persons
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Origin of YOO-HOO
probably alteration of yo-ho, interjection used to attract attention — more at yahoo
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