吃不服[chī bu fú]
not be accustomed to eating sth.; not be used to certain food:
例:生冷的东西我总吃不服。
Cold and raw things never agree with me.
1. not used to eating something:吃不了--cannot finish so much food | 吃不服--not used to eating something | 吃不上--have nothing to eat;miss a meal