大龄儿童低能少女
[dà líng ér tóng dī néng shăo nǚ]
The title '大龄儿童低能少女' translates to 'Grown-up Child Low-Functioning Teen Girl', playfully describing a girl who may act young and somewhat clueless even though she is older than what's considered teenage years, emphasizing lighthearted immaturity or silliness.