keep (something) down
Definition: to not vomit after eating. This verb is usually used with “can’t” to express the idea that you are unwell and vomit after eating.
(This phrasal verb has more than one meaning)
E.g.1: Oh doctor, I’m not well. I can’t keep anything down.
E.g.2: I’m feeling a little better today. I had a little food earlier and I managed to keep it down.
This phrasal verb can be separated (E.g. 2)