BMT can refer to different things depending on the context. Here are some possible meanings:

• Bone Marrow Transplant: A bone marrow transplant (BMT) is a medical procedure that replaces unhealthy blood-forming cells with healthy ones. Blood-forming cells are immature cells that grow into red blood cells, white blood cells, and platelets. They are found in the soft tissue inside your bones, called bone marrow. BMT is used to treat certain cancers or other diseases.

• Biggest, Meatiest, Tastiest: BMT is also the name of a sandwich sold at Subway. It is made up of beef salami, beef pepperoni, and chicken ham, and some say the name stands for "biggest, meatiest, tastiest". However, according to Delish, the sandwich was originally named after the Brooklyn-Manhattan Transit System "to go along with the chains transportation theme".

In summary, BMT can refer to a bone marrow transplant or a sandwich sold at Subway.