让我成备胎我让他爆胎
[ràng wŏ chéng bèi tāi wŏ ràng tā bào tāi]
The phrase 'Let me become your spare tire, I’ll blow his/her tires out' translates to expressing discontent when treated merely as a backup plan or secondary choice instead of a priority in relationships; it's an angry response showing a readiness to retaliate.