sour

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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 ?
Because of his stock transactions going sour, most of the university's stocks had been foreclosed, causing damage totaling 4.08 billion yen to the university, the sources said.
The BoE's Financial Policy Committee (FPC), which is expected to take charge from next year, has urged the current regulator to reassess whether banks' capital properly reflects the risk of loans going sour and future fines for misconduct.
Let's hope it's not going sour for these sweet girls.