别用你吃大姨妈的嘴说爱我
[bié yòng nĭ chī dà yí mā de zuĭ shuō ài wŏ]
A colloquial and slightly crude expression, this username can be translated to 'Don’t say you love me with the same mouth that swears.' It expresses distrust or disillusionment about declarations of love, suggesting a skeptical view towards insincere words.