A derogatory term for the group of students who started at Georgia Tech declared as engineering majors, but who then change to management. This is often due to their having failed Physics 2212 (Electricity and Magnetism). Those who "jump on the M-Train" are often derided by engineering students for general lack of willpower; then the engineer jumps on the train eirself.
E-Mag, Re-Mag, Three-Mag, Management!
Note: Georgia Tech students who begin their college careers as management majors do not have this term applied to them, because they were honest enough to know they wouldn't like calculus or physics before jumping in head first.