你脑子里装得都是屎我脑子里装得都是你
[nĭ năo zi lĭ zhuāng dé dōu shì shĭ wŏ năo zi lĭ zhuāng dé dōu shì nĭ]
Translated literally, this net name means 'Your brain is full of excrement but mine is filled with thoughts of you,' indicating strong, perhaps overwhelming affection or infatuation for another person, contrasted humorously or sarcastically with how the object of these feelings may not reciprocate the same level of devotion.