take a turn for the worse
Definition from Wiktionary, the free dictionary
- (idiomatic) To start to become worse; to worsen.
2011 September 24, Aled Williams, “Chelsea 4 - 1 Swansea”, in BBC Sport:
- But Torres's afternoon was to take a turn for the worse for a second week in succession as he was shown a straight red card by referee Mike Dean for a two-footed challenge on Gower.