A kind of chili at Skyline, a chili chain in Ohio, Kentucky,
Indiana, Michigan, and
Florida.
They also have a 3-way and a
5-way.
A 4-way chili is spaghetti topped with Skyline chili,
cheese, and diced onions or red
beans. In other words it's a 3-way chili with onions or
beans.
I'm here at college from IN. You can imagine the amusement and confusion that went down when I heard about the "famous 3-way".