Correct

不是你死,就是我活

/ bú shì nǐ sǐ, jiù shì wǒ huó /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/不是你死就是我活-Chinese-idioms-Cchatty-efa3aa18-6785-4c98-9d61-5b10a8450a9e-1612776230.jpg

Collocation

1
可谓不是你死,就是我活
2
真是不是你死,就是我活
3
到了不是你死,就是我活的地步

Definition

不是你死,就是我活

Literally means:

either you die or I live

Actually means:

have a life-and-death fight; one must die

It means a competition or fight is so fierce that one side has to die.

不是你死我活,就是我死你活。比喻双方势不 两立,不能共同存在。常用来说明敌对双方拼死相斗,或竞争对手之间的激烈较量。

Example

Used as predicate or attributive. (作谓语、定语)
1
men
我们
gēn
kǒng
恐怖
zhī
组织
juéduì
绝对
néng
可能
pínggòngchǔ
和平共处
  
,
彼此
de
dòuzhēng
斗争
shi
  
,
jiùshì
就是
huó
  

It is absolutely impossible for us to coexist peacefully with terrorist organizations, and our struggle with each other is either your death or my life.

2
Guànjūn
冠军
zhīyǒu
只有
  
,
suǒ
所以
zhè
cháng
sài
比赛
shi
  
,
jiùshì
就是
huó
  

There's only one champion, so this game is either you die or I live.

3
Zhè
liǎng
gōng
公司
de
jiàoliàng
较量
jīng
已经
dào
liǎo
shi
  
,
jiùshì
就是
huó
de
地步
  
,
rèn
任何
fāng
dōu
xiǎng
chè
彻底
kuǎ
打垮
duìfāng
对方
  

The battle between the two companies has reached the point where either you die or I live, and either side wants to bring down each other completely.