流的泪全是你脑子里进的水
[liú de lèi quán shì nĭ năo zi lĭ jìn de shuĭ]
A humorous expression saying that 'the tears I cry come from all the water you've gotten into your brain'. Here 'getting water into one's head' means foolish behavior. Hence this id implies someone cried due to others acting in an irrational manner, which brings humor out in a rather sarcastic way.