English

Definition of yoo-hoo exclamation from the Oxford Advanced Learner's Dictionary

 

yoo-hoo

 exclamation
exclamation
BrE BrE//ˈjuː huː//
 
; NAmE NAmE//ˈjuː huː//
 
(informal, becoming old-fashioned)
 
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used to attract somebody’s attention, especially when they are some distance away Word Originnatural exclamation: first recorded in English in the 1920s.
See the Oxford Advanced American Dictionary entry: yoo-hoo