順坡溜

Simplified: 顺坡溜

shùnpōliū ㄕㄨㄣˋ ㄆㄛ ㄌㄧㄡ

    • to drift into bad ways
    • to fall behind or sink gradually

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
slide down the slope
Meaning
To drift in a bad direction until one falls behind or sinks into bad ways. Critical.

Sources