go bad go bad /ɡoʊ bæd/

verb

1. Become unfit for consumption or use  ( go bad , spoil )
   become unfit for consumption or use
    The meat must be eaten before it spoils
   the meat must be eaten before it spoils
   
2. Stop operating or functioning  ( conk out [Informal] , give out , give way , break , die , go , go bad , crap out [Vulgar] , go phut [Vulgar] , break down , fail )
   stop operating or functioning
    The engine finally went
   The engine finally went
    The car died on the road
   The car died on the road
    The bus we travelled in broke down on the way to town
   The bus we travelled in broke down on the way to town
    The coffee maker broke
   The coffee maker broke
    The engine failed on the way to town
   The engine failed on the way to town
    Her eyesight went after the accident
   her eyesight went after the accident