Correct

鬼算盘

/ guǐ suàn pán /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/鬼算盘-Chinese-idioms-Cchatty-c32143f4-a046-4a96-83e4-1910069fb714-1612778457.jpg

Collocation

1
谁知道他有什么鬼算盘
2
他不停地打他的鬼算盘
3
鬼算盘打得啪啪响

Definition

鬼算盘:

Literally means:

devilish abacus

Actually means:

算盘, abacus, China's traditional calculation tool. It figuratively refers to a plan.

The whole phrase figuratively refers to a wicked idea or a devilish plan. It is derogatory.

算盘,中国的传统计算工具,比喻打打算或计划。

鬼算盘,比喻不好的心思,或不利于别人的打算。具有贬义色彩。

Example

Used as object. (作宾语)
1
Zhè
tiān
tíng
不停
de
guǐsuànpán
鬼算盘
  
,
xiǎng
zhāo
如何
zhè
jiàhuò
假货
gǎnkuài
赶快
mài
chū
出去
  

These days he keeps hitting his ghost abactas, thinking about how to sell the fakes quickly.

2
Xiǎo
小鲁
shì
lǎoshi
老实
de
rén
  
,
哪里
zhīdào
知道
xiǎo
zhào
zi
肚子
yǒu
shénme
什么
guǐsuànpán
鬼算盘
  
!

Xiaolu is an honest person, where to know what ghost abacus in Xiao Zhao's stomach!

3
men
他们
yǒu
de
guǐsuànpán
鬼算盘
  
,
dōu
xiǎng
zhàn
dào
duìfāng
对方
de
biàn
便宜
  

They each have their own ghost abacies, all want to take advantage of each other's cheap.