烂韭菜

Traditional (Taiwan): 爛韭菜

lànjiǔcài ㄌㄢˋ ㄐㄧㄡˇ ㄘㄞˋ

    • person with many bad habits who cannot be reformed

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
rotten chives
Meaning
A person with many bad habits who can't be reformed. Insulting.

Sources