泥飯碗

Simplified: 泥饭碗

nífànwǎn ㄋㄧˊ ㄈㄢˋ ㄨㄢˇ

    • unstable job that is easily lost

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
clay rice bowl
Meaning
An unstable job that is easily lost, as opposed to an 'iron rice bowl'.

Sources