说你2B感觉太对不起铅笔
[shuō nĭ 2b găn jué tài duì bù qĭ qiān bĭ]
Translates into 'Calling you 2B feels unfair to the pencil,' which humorously refers to a pencil lead grade (2B). This nickname is likely playful banter between friends who use humor as a bridge of friendship or teasing.