我有你妹的范er
[wŏ yŏu nĭ mèi de fàn er]
'Wǒ yǒu nǐ mèi de fàn ér' translates roughly to 'I’ve got your little sister’s style' - this might imply having a style or attitude resembling the younger sister's personality in a lighthearted way. However, this expression contains a mild slang element which could come across as playful yet possibly controversial depending on the context.