Go sour phrase informal figurative
To become less pleasant; turn out badly.
It seems that their relationship is going sour.
We have dated for two years and now everything has gone sour.
The truck with the speakers almost hit us. It almost did go sour.
To be put in a bad mood
Used to refer to an unpleasant, repellent place, thing or person
To be difficult, troublesome, or unpleasant for someone; to be to someone's disadvantage.
The verb "go" should be conjugated according to its tense.
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him