下药捻子

Traditional (Taiwan): 下藥捻子

xiàyàoniǎnzi ㄒㄧㄚˋ ㄧㄠˋ ㄋㄧㄢˇ ˙ㄗ

    • to egg someone on to lose their temper or make trouble

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
to put in a fuse
Meaning
To egg someone on to lose their temper or make trouble. Critical.

Sources