Correct

拍胸脯

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/拍胸脯-Chinese-idioms-Cchatty-f02080a3-723d-420f-89cd-0a1903f7cfbe-1612777259.jpg

Collocation

1
拍了一下胸脯
2
拍着胸脯……
3
不敢拍胸脯
4
不能急于拍胸脯
5
拍了胸脯

Definition

拍胸脯

Literally means:

slap ones' chest

Actually means:

make a promise

It means slapping one's own chest as a gesture of promise or guarantee.

拍打自己的胸脯,借以表示对某事敢于肯定、保证、承诺或负责。

Example

Used as predicate or object, and it can have other words in between. (作谓语、宾语,中间可插入别的词语)
1
Nián
年底
gěi
jiā
大家
jiā
gōng
工资
  
,
zhè
shì
chǎngzhǎng
厂长
jīng
已经
pāi
le
xiōng
胸脯
  
,
jiā
大家
可以
fàngxīn
放心
le
  

At the end of the year to give everyone a pay rise, this matter factory director has patted the chest, we can rest assured.

2
de
shì
huì
jìn
尽力
bàn
de
  
,
dànshì
但是
gǎn
pāi
xiōng
胸脯
  
,
shuō
dìng
一定
néng
bàn
chéng
  

He'll try his best to do your thing, but he's afraid to pat his chest.

3
zài
kǎoshì
考试
qián
jīng
已经
zuò
le
chōngfèn
充分
de
zhǔnbèi
准备
  
,
suǒ
所以
pāi
zhāo
xiōng
胸脯
shuō
  
,
zhè
这次
kǎoshì
考试
dìng
一定
可以
kǎo
cuò
不错
de
fēnshù
分数
  

He had made full preparations before the exam, so he patted his chest and said that he would get a good score in this exam.