再来一次大姨妈就是暑假了
[zài lái yī cì dà yí mā jiù shì shŭ jiă le]
A somewhat casual expression combining Chinese culture (using a euphemism '大姨妈', meaning menstrual cycle, commonly used in informal language) with school life (waiting for summer vacation). It means the user can only count on their next period cycle before school is dismissed for the summer.