掐指一算姑娘你没我别活两指一算少年你命里缺我
[qiā zhĭ yī suàn gū niáng nĭ méi wŏ bié huó liăng zhĭ yī suàn shăo nián nĭ mìng lĭ quē wŏ]
This internet name implies a confident, dramatic expression where the person claims they are indispensable to both girls and boys. '掐指一算' (calculating on fingers) signifies making predictions or judgments, and it is meant to add a comedic or exaggerated feel to the claim.