放空气

Traditional (Taiwan): 放空氣

fàngkōngqì ㄈㄤˋ ㄎㄨㄥ ㄑㄧˋ

    • to spread rumours
    • to deliberately stir up a certain opinion

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

Literally
release air
Meaning
To spread rumours or deliberately create a certain mood or public opinion.

Sources