Definitions for go bad
fail, go bad, give way, die, give out, conk out, go, break, break down(verb)
stop operating or functioning
"The engine finally went"; "The car died on the road"; "The bus we travelled in broke down on the way to town"; "The coffee maker broke"; "The engine failed on the way to town"; "her eyesight went after the accident"
spoil, go bad(verb)
become unfit for consumption or use
"the meat must be eaten before it spoils"
Of foods and commodities, to spoil, rot, or otherwise become unusable due to age or storage conditions.
Of a person or entity, to cease to be reputable and instead become delinquent, criminal, or poorly behaved.
Of a geographic area, to become unsafe.