go sour

Related to go sour: turned sour, sourer

go sour

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!
See also: go, sour
Farlex Dictionary of Idioms.

go sour

Fig. to turn bad or unpleasant. It looks like all my plans are going sour. My whole life is going sour right now.
See also: go, sour
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

go/turn ˈsour

become less enjoyable, pleasant or good: Relations between the two nations have recently gone sour.
See also: go, sour, turn
Farlex Partner Idioms Dictionary

go sour

in. to turn bad or unpleasant. My whole life is going sour right now.
See also: go, sour
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • go/turn sour
  • turn sour
  • come to a bad end
  • come to a bad/sticky end
  • dance card is full, my
  • go to the devil/hell
  • not know whether you're coming or going
  • what part of no don't you understand?
  • don't change/swap horses in midstream
  • give (someone) what for, to
References in periodicals archive
* WHILE CPAs CAN OFFER LITTLE HELP TO families who have had loans and loan guarantees go sour, they can advise all other clients about the potential tax consequences and offer to provide advance assistance.
But when deals go sour, you can end up thousands of pounds out of pocket and still face the nightmare of eviction...