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haywire

adjective
 
 
/ˈheɪ.waɪər/ US  /-waɪr/ informal

Definition

go haywire to stop working, often in a way that is very sudden and noticeable: The television's gone haywire.Not functioning
(Definition of haywire adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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