男神的心思你别猜
[nán shén de xīn sī nĭ bié cāi]
It means 'don't try to guess what is going through the mind of the so-called ideal man'. It may express frustration from the user who believes men's (especially good-looking ones or popular male figures) thoughts are beyond ordinary women's comprehension, or it could simply indicate that the person has an attitude of being difficult to understand or figure out.