go bad; lose original meaning
Meanings
2 senses · 6 examplesverb
(of food) to go bad; to spoil; to turn rancid
informalDescribes food that has gone off and lost its good taste or smell, often due to age or improper storage. The character 儿 indicates the optional erhua pronunciation.
The milk was left at room temperature for a day and has already gone bad.
These peanuts have a bit of an off taste; don't eat them.
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It's too hot; the leftover food went bad quickly without being refrigerated.
verb
to lose its original flavor/essence; to be distorted; to change for the worse
neutralMetaphorical use describing things, ideas, or activities that have deviated from their original, positive nature.
After the traditional culture was commercialized, it feels like it lost its original essence.
If a joke among friends turns into a personal attack, it's no longer the same thing.
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If a charity event is just for show, it completely loses its true meaning.