别用说过爱她的嘴来说爱我
[bié yòng shuō guò ài tā de zuĭ lái shuō ài wŏ]
This nickname expresses a sentiment where the person is conveying that someone who has expressed love to another should not try to profess love to them. It reflects a desire for authenticity in love and distrust of those seen as unfaithful or deceptive.