姨妈怎么还不走姨夫怎么还没来
[yí mā zĕn me hái bù zŏu yí fū zĕn me hái méi lái]
This nickname is a play on words involving traditional Chinese marriage customs. '姨妈' ('Aunt') could refer to an older female relative or more humorously, one’s period. '姨夫' (literally “uncle” but implying an intimate partner) implies eagerness for a significant other to appear as the speaker wishes for both their 'aunt' to leave and 'uncle' to come at same time.