大姨妈家的小姨妈
[dà yí mā jiā de xiăo yí mā]
In Chinese tradition, 大姨妈 (dàyímā) can also mean the menstrual period in a jocular way while 小姨妈 refers to the younger unmarried aunt on the mother's side.This internet slang name may come from humor or the self-ironic attitude of someone feeling old when their younger relatives have appeared in her family