補窟窿

Simplified: 补窟窿

bǔkūlong ㄅㄨˇ ㄎㄨ ˙ㄌㄨㄥ

    • to make up a shortfall or deficit
    • to cover one debt with another

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
patch up a hole
Meaning
To make up a shortfall or deficit, especially of money, often by covering one debt with another.

Sources