大姨妈红遍了大江南北
[dà yí mā hóng biàn le dà jiāng nán bĕi]
In Chinese slang, 'Big Aunt' refers to menstrual period, this phrase humorously or figuratively means menstrual bleeding has occurred almost everywhere. Note: Such nicknames are casual and contextually funny or teasing for specific audiences familiar with the context or background of such sayings.