下油锅

Traditional (Taiwan): 下油鍋

xiàyóuguō ㄒㄧㄚˋ ㄧㄡˊ ㄍㄨㄛ

    • to suffer terrible hardship and torment

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
go into the oil cauldron
Meaning
To suffer terrible hardship and torment, from the folk belief that evildoers are fried in boiling oil in hell.

Sources