姐不美你别爱
[jiĕ bù mĕi nĭ bié ài]
This internet name carries a playful tone. It suggests that if the sister (or someone regarded as a sister) isn't beautiful, then don't love her. This can either mean 'sister's beauty is essential to love' or be interpreted ironically, where 'beauty' is downplayed, implying love shouldn't depend only on appearance.