Verb: go bad
- Become unfit for consumption or use
"the meat must be eaten before it goes bad";
- spoil, go off
- Stop operating or functioning
"The engine went bad on the way to town";
- fail, give way, die, give out, conk out [informal], go, break, break down, pack up [Brit, informal], give up the ghost [informal]
Derived forms: going bad, gone bad, went bad, goes bad