go bad

1. Spoil, decay; also, turn to crime. For example, You can tell from the smell that this milk has gone bad, or If he keeps running around with that street gang, he's sure to go bad. [Late 1800s]

Related Words

• atrophy 
• corrode 
• decompose 
• degenerate 
• discolor 
• disintegrate 
• dissolve 
• dwindle 
• fade 
• get worse www.thesaurus.com
• lessen 
• mortify 
• pollute 
• rot 
• shrivel 
• wane 
• wither