Correct

揭老底

/ jiē lǎo dǐ /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/揭老底-Chinese-idioms-Cchatty-0ba7ea57-3c61-479f-bc94-de8dce012c94-1612777350.jpg

Collocation

1

Definition

揭老底

Literally means:

rake up the unmentionable past

Actually means:

dig up the past

It means digging up one's inglorious history or experience. It also means revealing the unmentionable detail in an event.

揭露某人不光彩的来历或经历。也指揭露某件事情里面见不得人的底细。

Example

Used as predicate or object. It can be used with other words in between. (作谓语、宾语,中间可插其他词语)
1
Yǒurén
有人
jiē
le
de
lǎode
老底
  
,
shuō
shì
mài
jiǎhuò
假货
de
hèngcái
横财
  

Someone exposed him as a windfall selling fakes.

2
Zhè
liǎng
jiā
gōng
公司
xiāng
互相
gōng
攻击
  
,
jiē
lǎode
老底
  
,
zuìhòu
最后
gǎo
de
dōu
guāngcǎi
光彩
  

The two companies attacked each other, exposed each other, and ended up in disgrace.

3
chuī
吹嘘
自己
yǒu
hěnduō
很多
qián
  
,
pángbiān
旁边
de
péngyou
朋友
xiǎng
jiē
lǎode
老底
  
,
zhǐshì
只是
qiāoqiāo
悄悄
gào
告诉
qián
以前
shì
piànzi
骗子
  

He boasted that he had a lot of money, and his friends didn't want to expose him, but quietly told me he was a liar.