Correct

老掉牙

/ lǎo diào yá /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/老掉牙-Chinese-idioms-Cchatty-515cb9f1-3617-4191-9df9-f7d30f16b3ad-1612777975.jpg

Collocation

1
老掉牙的言论
2
老掉牙的东西
3
都老掉牙了

Definition

老掉牙

Literally means:

so old that my teeth are falling out

Actually means:

very old; out of date

It figuratively describes something archaic or quite out of date. It is usually used to describe something

形容早就过时了,或非常旧了。多适用于东西或言论。有时略含贬义。

Example

Used as predicate or attributive. (作谓语、定语)
1
kuài
shǒubiǎo
手表
suīrán
虽然
dōu
lǎodiào
老掉牙
le
  
,
què
shì
ye
爷爷
chuán
xiàlai
下来
de
míngbiǎo
名表
  
,
shuō
据说
起码
zhí
wàn
五万
yuán
  

Although his watch is old, it is his grandfather passed down the famous watch, it is said to be worth at least 50,000 yuan.

2
hái
kāi
zhāo
zhè
liàng
lǎodiào
老掉牙
de
chē
luànpǎo
乱跑
ā
  
?
Suàn
le
  
,
háishi
还是
mǎi
liàng
xīn
de
  
!

Are you still running around in your old car? Come on, buy a new one!

3
Zhège
这个
xīn
chǎngzhǎng
厂长
shízài
实在
tài
zhèngtǒng
正统
le
  
,
hái
gēn
xiǎoqīngnián
小青年
jiǎng
xiē
那些
lǎodiào
老掉牙
de
shì
故事
  
,
guàibude
怪不得
men
他们
bèihòu
背后
dōu
jiào
ye
爷爷
  

The new factory director is too orthodox, but also with young people to tell those old stories, no wonder they are behind his grandfather.

Related

老掉牙