Correct

打屁股

/ dǎ pì gu / 
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/打屁股-Chinese-idioms-Cchatty-fb821e6c-c406-4fee-b154-db81e2032e70-1612777142.jpg

Collocation

1
狠狠地打屁股
2
打……的屁股
3
应该打屁股

Definition

打屁股

Literally means:

spank sb

Actually means:

get punished

It figuratively means criticizing or punishing somebody, often used between people who are close to each other with a joking tone.

比喻进行批评或处罚。多用于关系较近的人之间,有开玩笑的意味。

Example

Used as predicate or object, and can have other words in between. (作谓语、宾语,中间可以插入别的词语)
1
Zhège
这个
yuè
月
nǐ
你
yàoshi
要是
xiě
写
bù
不
wán
完
zhè
这
běn
本
shū
书
  
,
wǒ
我
jiù
就
dá
打
nǐ
你
de
的
pìgu
屁股
  
!

If you can't finish this book this month, I'll spank you!

2
Zhème
这么
jiǎndān
简单
de
的
shì
事
dōu
都
zuò
做
bùhǎo
不好
  
,
wǒ
我
kàn
看
nǐ
你
zhēn
真
yīnggāi
应该
dǎ
打
pìgu
屁股
le
了
  
!

Such simple things can not do well, I think you really should spank!

3
Jiàoliàn
教练
rènwéi
认为
bǐsài
比赛
shūdiào
输掉
de
的
yuányīn
原因
shì
是
duìyuán
队员
tài
太
lǎn
懒
  
,
bìng
并
shuō
说
yào
要
hěnhěn
狠狠
de
地
dá
打
tāmen
他们
de
的
pìgu
屁股
  
。

The coach thought the reason for the loss was that the players were too lazy and said to hit them hard on the ass.