go sour(redirected from going sour)
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To become unpleasant or troubling. Those two are bickering all the time now—I hope their relationship hasn't gone sour. Don’t bring up politics unless you want things to go sour real fast!
Fig. to turn bad or unpleasant. It looks like all my plans are going sour. My whole life is going sour right now.
go/turn ˈsourbecome less enjoyable, pleasant or good: Relations between the two nations have recently gone sour.
in. to turn bad or unpleasant. My whole life is going sour right now.