谁把我当备胎我就让他爆胎
[shéi bă wŏ dāng bèi tāi wŏ jiù ràng tā bào tāi]
In this username, '备胎' (spare tire) is a metaphor for someone used as a backup romantic option. This username declares that anyone who sees them as a mere backup will face retribution. It conveys frustration and defiance against those who don't value the user seriously.