HSK 7–9 · verb · Practice

搞鬼

gǎoguǐ

to play tricks; to make mischief secretly

这件事一定有人在背后搞鬼。

Zhè jiàn shì yídìng yǒu rén zài bèihòu gǎoguǐ。

Someone must be playing tricks behind the scenes on this matter.