Correct

不懂装懂

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/不懂装懂-Chinese-idioms-Cchatty-1b36a8c5-6be5-4ad7-9861-5dd322ec4512-1612776220.jpg

Collocation

1
不要不懂装懂
2
不懂装懂地……
3
有时不懂装懂
4
还是不懂装懂
5
不要不懂装懂
6
总是不懂装懂

Definition

不分青红皂白:

Literally means:

pretend to know

Actually means:

It means that somebody pretends to know something that they do not really know.

It mainly refers to some people who do not want to admit the fact that they know little about certain things, because of vainglory. Derogatory.

不明白,却非要装作明白的样子。

多指人因为虚荣或者爱面子而不好意思承认自己不明白某些事情。具有贬义色彩。

Example

Used as predicate, adverbial adjunct or object. (作谓语、状语、宾语)
1
guǒ
如果
mǒuxiē
某些
fāng
地方
kàn
míngbái
明白
  
,
可以
qǐngjiào
请教
biéren
别人
  
,
qiānwàn
千万
yào
不要
dǒngzhuāngdǒng
不懂装懂
  

If some places do not understand, you can ask others, do not do not understand.

2
shí
其实
  
,
tīng
dǒng
zài
shuō
shénme
什么
  
,
dàn
xiàohuà
笑话
  
,
háishi
还是
dǒngzhuāngdǒng
不懂装懂
diǎn
地点
diǎntóu
点头
  

In fact, I can't understand what he's talking about, but I'm afraid he'll laugh at me and still don't understand nodding.

3
Biǎomiàn
表面
kàn
hǎoxiàng
好像
dǒngde
懂得
hěnduō
很多
shìqíng
事情
  
,
shí
其实
shì
dǒngzhuāngdǒng
不懂装懂
  

On the face of it, he seems to know a lot of things, but he doesn't actually know how to pretend to understand.