抽椽子

chōuchuánzi ㄔㄡ ㄔㄨㄢˊ ˙ㄗ

    • to sabotage something secretly
    • to undermine

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
pull out the rafters
Meaning
To secretly sabotage something, since removing rafters brings the roof down. Critical.

Sources