I threw up in my mouth a little bit - A way to show you're so sick of something you're like a tiny

A way to show you're so sick of something you're like a tiny vomit monster in your head.

I saw my sister eat a piece of cake with frosting and I threw up in my mouth a little bit.

I watched my neighbor eat a burger with five kinds of cheese and I threw up in my mouth a little bit.

I saw my friend eat a whole plate of nachos and I threw up in my mouth a little bit.