go sour

US /ɡoʊ ˈsaʊər/
UK /ɡoʊ ˈsaʊər/
"go sour" picture
1.

memburuk, menjadi tidak menyenangkan, gagal

to turn out badly; to become unpleasant or unsuccessful

:
Their business partnership started well, but then things began to go sour.
Kemitraan bisnis mereka dimulai dengan baik, tetapi kemudian segalanya mulai memburuk.
Their relationship began to go sour after a series of arguments.
Hubungan mereka mulai memburuk setelah serangkaian pertengkaran.