This quote humorously emphasizes the speaker's unwillingness to waste their expensive mascara by crying over insignificant boys. It implies that the person being referred to lacks importance or value in the speaker's eyes. By equating the cost of their mascara to the worthiness of shedding tears, the quote suggests that the speaker values their personal investment and emotional well-being more than investing emotions in someone unworthy. Ultimately, it conveys a message of self-worth, independence, and the unwillingness to let insignificant individuals affect one's emotions or overall happiness.