Correct

神出鬼没

/ shén chū guǐ méi / 
Strokes

Definition

lit. to appear and disappear unpredictably like a spirit or a ghost (idiom)/fig. elusive

Example

Definition

appear and disappear mysteriously; come and go like a ghost/shadow

1
Yóujīduì
游击队
shénchūguǐméi
神出鬼没
  
,
gǎo
搞
de
得
dírén
敌人
yūntóuzhuǎnxiàng
晕头转向
  
。

The guerrillas came and went mysteriously,driving the enemy out of their wits.

2
Tā
他
shénchūguǐméi
神出鬼没
  
,
bùzhī
不知
yī
一
tiān
天
dōu
都
zài
在
gànshénme
干什么
  
。

He is a mysterious person; no one really knows what he is doing from day to day.