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.
Said of one who directly takes charge of numerous duties including vital or small daily tasks within an organization
She opened the local hotpot restaurant and called herself as the chief cook and bottle washer.