Definition of yikes exclamation from the Oxford Advanced Learner's Dictionary

 

yikes

 exclamation
exclamation
BrE BrE//jaɪks//
 
; NAmE NAmE//jaɪks//
 
(informal)
 
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used to show that you are surprised or suddenly afraid Word Origin 1970s: of unknown origin.
See the Oxford Advanced American Dictionary entry: yikes