пойти не так

go wrong (Юрий Гомон); go amiss (We must find out what went amiss in order to avoid such mishaps in the future. )

go pear-shaped (The whole deal went pear-shaped, probably cost us 20, 30 million Taras)

go south (I should be there for insurance. There are a lot of ways this can go south Taras)

go awry; turn ugly (Know where the closest clinic or hospital is and have a game plan to get there if things turn ugly.)

пойти не так

: 50 phrases in 7 subjects