貌丑如猪卑鄙似狗
[mào chŏu rú zhū bēi bĭ sì gŏu]
Literally translated to 'as ugly as a pig, and low like a dog', it appears negative at first look. However in the context of online nickname, it's often self-deprecating in humor and humility, showing one's down-to-earth attitude without pretending too well-kept.