说你2B都对不起铅笔
[shuō nĭ 2b dōu duì bù qĭ qiān bĭ]
Literally translated, this means 'Calling you an idiot is disrespectful to pencils.' Here, 2B refers both to the pencil (HB) and also insults the person playfully but harshly, emphasizing their foolishness.