瓷饭碗

Traditional (Taiwan): 瓷飯碗

cífànwǎn ㄘˊ ㄈㄢˋ ㄨㄢˇ

    • unstable or temporary job
    • insecure source of income

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
porcelain rice bowl
Meaning
A job or income that is unstable or temporary, as fragile as china. The opposite of the 'iron rice bowl' (铁饭碗).

Sources