苹果不是香蕉葡萄不是橘子
[píng guŏ bù shì xiāng jiāo pú táo bù shì jú zi]
An apple is not a banana and grapes are not oranges. A straightforward expression, indicating everyone has their unique personality. Just like all fruit differs, humans differ as well. Each one is irreplaceable. The owner of this nickname emphasizes their individual uniqueness and doesn't follow the crowd.