掐指一算菇凉你命里却我扳指一算少年你没我别活
[qiā zhĭ yī suàn gū liáng nĭ mìng lĭ què wŏ bān zhĭ yī suàn shăo nián nĭ méi wŏ bié huó]
The phrase loosely conveys two parts, both expressing astrological prediction or fate calculation in a playful manner, with '掐指一算' meaning predicting one’s destiny using finger counting and '姑娘你命里缺我/少年你没我没活路', which suggests playfully or arrogantly that life would not go on well without this person for the other party.