bù​shì​yú​sǐ​jiù​shì​wǎng​pò

a life-and-death struggle

Senses

不是鱼死就是网破/ 不是魚死就是網破 bù​shì​yú​sǐ​jiù​shì​wǎng​pò a life-and-death struggle

Literally "either the fish dies or the net gets torn"; describes a situation where two sides fight so fiercely that one must be destroyed.

References

see 不是鱼死就是网破/不是魚死就是網破 鱼死网破/魚死網破