肠粉
[cháng fĕn]
'肠粉' (Changfen) is a popular snack in Southern China made from steamed fermented rice and starch powder in strips form and filled with meat, egg or vegetables inside. Using food name as an internet handle implies that he probably is very interested in the dish and wants people to think of him when it comes to eating '肠粉'. Also, it conveys a down-to-earth image of himself as someone who likes everyday snacks rather than fancy dishes.