万人衬衫
[wàn rén chèn shān]
Translates to 'shirt of ten thousand men'. It may imply this user doesn't follow crowd fads or likes to wear distinctive clothes. On other aspects, since 白衬衫 (white shirt) usually describes handsome, successful and professional young males, '万人衬衫' seems like implying that he is charming, loved, desired and wanted, like one's shirt has scent or aura attracting all around, so many people want to own him or possess this quality.