There's only a few types of food that literally make me sick to my stomach, McDonalds being one of them. It seems to matter not what I order, immediately after eating my stomach hurts and I feel like I need to lie down.
The other killer for me is Americanized Chinese food. It tastes great going down, but I almost always feel nauseated afterward and even have a slight headache. I think I'm MSG sensitive.
I try to avoid both at all costs.