擺八卦陣

Simplified: 摆八卦阵

bǎibāguàzhèn ㄅㄞˇ ㄅㄚ ㄍㄨㄚˋ ㄓㄣˋ

    • to create confusion on purpose and play tricks to hide one's real intent

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
set out the eight-trigram battle formation
Meaning
To create confusion on purpose and play tricks so others can't tell your real intent. Critical.

Sources