Definition & Meaning of "the meat in the sandwich"

What is the origin of the idiom "the meat in the sandwich" and when to use it?

The idiom "the meat in the sandwich" likely draws its origins from the literal concept of a sandwich, where the meat or filling is the substantial part between two pieces of bread. In its figurative use, "the meat in the sandwich" refers to a person or thing placed in the middle of two opposing or challenging situations, much like the substantial filling in a sandwich.