放瞎炮

fàngxiāpào ㄈㄤˋ ㄒㄧㄚ ㄆㄠˋ

    • to talk without getting to the point

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
fire a dud blast
Meaning
To speak without getting to the point or hitting the key issue.

Sources