gone bad

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb Past participle of go bad
• adjective Of foods and commodities, having become spoiled, rotten, or otherwise unusable due to age or storage conditions.
• adjective Of a person or entity, having ceased to be reputable and having instead become delinquent, criminal, or poorly behaved.
• adjective Of a geographic area, having become unsafe.