西瓜爱人西瓜情人
[xī guā ài rén xī guā qíng rén]
In a whimsical manner, this nickname uses the term watermelon ('西瓜') to describe either partners involved in romantic relations ('爱人' meaning beloved one and '情人' being a lover). Perhaps chosen because of someone's love for watermelons or its symbol of summer joy and romance