開頭炮

Simplified: 开头炮

kāitóupào ㄎㄞ ㄊㄡˊ ㄆㄠˋ

    • to be the first to speak or act
    • to get things going

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
fire the first cannon shot
Meaning
To be the first to speak or act and so set things going. Usually written 打头炮.

Sources