He has the runs
他腹泻不止

讲解：
This is kind of gross, but unfortunately it's something you need to know if you ever go to a doctor. "The runs" is another word for diarrhoea. You can also say, the "food keeps running right through me.
The runs就是diarrhoea，腹泻的意思。也可以用“food keeps running right through me”来表达腹泻。