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to go sour
01
(of situations, moods, or relationships) to become unpleasant or unsuccessful
![to [go] sour definition and meaning](https://cdn.langeek.co/photo/41295/original/?type=jpeg "to [go] sour definition and meaning")
Idiom02
(of food or drinks) to become unpleasant in taste or smell
Collocation
Примеры
Be sure to check the expiration date; yogurt can quickly go sour.
