挂上钩

Traditional (Taiwan): 掛上鉤

guàshànggōu ㄍㄨㄚˋ ㄕㄤˋ ㄍㄡ

    • to get in touch with
    • to link up with someone or something

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
hook on
Meaning
To get in touch or link up with someone or something, like train cars being coupled. Neutral, and sometimes implies a slightly shady connection.

Sources