姐是正太控
[jiĕ shì zhèng tài kòng]
This nickname 'Jie Shi Zhengtai Kong' translates to 'Older Sister is a Young Boy Fan'. In internet slang, this suggests the user has a fondness for young-looking, androgynous boys or male characters often depicted in Japanese manga or anime. This interest in younger-looking men could be purely aesthetic rather than literal.