乃是绿茶婊
[năi shì lǜ chá biăo]
This is a rather offensive term combining '乃' (indeed) and '绿茶婊' (green tea b*tch), implying a person, usually a woman, who appears innocent and virtuous but is secretly manipulative or deceptive. It's a derogatory term used negatively to label certain types of behavior.