因为你脑子不好
[yīn wéi nĭ năo zi bù hăo]
'Because Your Mind Isn't Good' can come off as a very blunt or teasing critique toward someone, directly stating that their cognitive abilities might be subpar or suggesting that someone does not think things through carefully enough. Although this phrase has a negative connotation, in some scenarios it also plays humorously depending on who uses it and under what conditions