Correct

打自己嘴巴

/ dǎ zì jǐ zuǐ bā /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/打自己嘴巴-Chinese-idioms-Cchatty-dc1e1f5f-f217-4319-8282-61816d75cb69-1612777180.jpg

Collocation

1
自己打自己嘴巴

Definition

打自己嘴巴

Literally means:

slap ones'own face

Actually means:

It refers to the contradiction between one's speech and deeds. Derogatory.

比喻说话做事自相矛盾。具有贬义色彩。

Example

Used as predicate, object, and can have other words in between. (作谓语、宾语,中间可以插入别的词语)
1
Zuótiān
昨天
shuō
yào
父母
一起
zhù
  
,
jīntiān
今天
yòu
shuō
yào
自己
rén
zhù
  
,
zhè
shi
自己
自己
zuǐba
嘴巴
ma
  
?

Yesterday said to live with parents, today also said to live alone, this is not their own mouth?

2
jīng
已经
duì
jiā
大家
shuō
le
  
,
míngtiān
明天
zhòngshù
种树
  
,
shuí
dōu
zhǔn
不准
qǐngjià
请假
  
,
yàoshi
要是
xiànzài
现在
ràng
qǐngjià
请假
  
,
shi
自己
自己
de
zuǐba
嘴巴
ma
  
?

I have said to you, tomorrow to plant trees, no one is allowed to ask for leave, if now let you take leave, I am not their own mouth?

3
Zhège
这个
gōngtóu
工头
jīngcháng
经常
zuò
自己
自己
zuǐba
嘴巴
de
shìqing
事情
  
,
suǒ
所以
shuō
de
huà
gōngrén
工人
dōu
tīng
  

The fore foreman often does what he does to hit himself in the mouth, so the workers don't listen to what he says.