sour

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Related to go sour: turned sour, sourer

sour

1. made acid or bad, as in the case of milk or alcohol, by the action of microorganisms
2. (esp of the weather or climate) harsh and unpleasant
3. (of oil, gas, or petrol) containing a relatively large amount of sulphur compounds
4. Chiefly US any of several iced drinks usually made with spirits, lemon juice, and ice

sour

[sau̇r]
(chemistry)
Containing large amounts of malodorous sulfur compounds (such as mercaptans or hydrogen sulfide), as in crude oils, naphthas, or gasoline.
References in periodicals archive ?
A hypochondriacal land owner (played by Arye Gross) comes to ask for the hand of his neighbor's daughter (Emily Bergl) only to have the entire deal nearly go sour once the couple-to-be starts arguing about property rights and who owns the better hunting dog.
Of course, things quickly go sour, and when the truth is found out, Antoine is suspended and eventually sent to a reform school and for therapy.
The vacation, he recalled, began to go sour Wednesday afternoon when the winds picked up speed.