邮寄一只野猫
[yóu jì yī zhĭ yĕ māo]
To 'Mail a Wild Cat' can denote unpredictability and spontaneity, as wild cats aren't tame and act without patterns; mailing also gives a feel of sending something distant. So this nickname might represent someone with a free spirit, boldness, or mysterious allure, possibly unpredictable or hard-to-approach.