Definition of conk out phrasal verb from the Oxford Advanced American Dictionary

 

conk out

 phrasal verb
phrasal verb
 
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Phrasal Verbs

    conk out

    (informal)
     
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  1. 1(of a machine, etc.) to stop working The car conked out halfway up the hill.
  2. 2(of a person) to go to sleep
See the Oxford Advanced Learner's Dictionary entry: conk out