搞鬼

搞鬼	gǎo guǐ	to make mischief / to play tricks
搞	gǎo	to do / to make / to go in for / to set up / to get hold of / to take care of
鬼	guǐ	disembodied spirit; ghost; devil / (suffix) person with a certain vice or addiction etc / sly; crafty; resourceful (variant of 诡) / one of the 28 constellations of ancient Chinese astronomy