若相惜定不离若相依定不弃
[ruò xiāng xī dìng bù lí ruò xiāng yī dìng bù qì]
Translating to 'If we cherish each other, we will never separate; if we rely on each other, we will never abandon each other,' this nickname expresses the belief in mutual respect and interdependence, suggesting a promise of fidelity and unity in relationships.