It’s often assumed that the pork butt is from the rear end of the pig, even though cuts from the back region already have a name: ham. The pork butt, also known as a Boston butt, is cut from the other end, the upper shoulder of the pig. It’s called a “butt” because in pre-Revolutionary War New England the roasts were stored and transported in barrels called “butts”, and the confusing name stuck.