Correct

不三不四

/ bù sān bù sì /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/不三不四-Chinese-idioms-Cchatty-2632ec92-89f5-4729-9dd5-e47466b0f102-1612776187.jpg

Collocation

1
做得不三不四
2
弄得不三不四
3
不三不四的地方
4
不三不四的话
5
不三不四的打扮
6
不三不四的样子
7
不三不四的
8
不三不四的人

Definition

不三不四:

Literally means:

no three no four

Actually means:

It means being indecent or unbecoming. It is often used to scold others with a disdainful tone. Derogatory.

不正派,不像样子。多用于指责别人,有轻蔑的口气。具有贬义色彩。

Example

Used as attributive, predicate or complement . (作定语、谓语、补语)
1
Xiǎo
小李
de
父母
ràng
suíbiàn
随便
wàichū
外出
  
,
zài
wàimiàn
外面
gēn
xiē
一些
sān
不三不四
de
rén
hún
zài
一起
xué
huài
le
  

Xiao Li's parents won't let him go out at will, for fear that he'll learn badly outside with some people who are not three or four.

2
Zhège
这个
rén
女人
de
ban
打扮
sān
不三不四
  
,
ràng
rén
kàn
le
ěxīn
恶心
  
,
gǎnkuài
赶快
jiào
kāi
离开
huìchǎng
会场
  
!

This woman's dress is not three or four, let people see disgusting, hurry up and tell her to leave the meeting!

3
dāngrán
当然
zhīdào
知道
zài
zhì
布置
fángjiān
房间
  
,
shì
可是
yīnggāi
应该
fángjiān
房间
lòng
de
sān
不三不四
de
  
,
ràng
rén
kàn
zhāo
shùnyǎn
顺眼
ā
  

Of course I know you're setting up a room, but you shouldn't make it any different.

Related

不三不四