People who root for the sports (particularly football) programs of the University of Notre Dame who never actually attended the University of Notre Dame. Typically Irish-American, alcoholic, low income, and poorly educated assholes who could never dream of being accepted to an educational institution as prestigious as Notre Dame.
They're called the Subway Alumni because the more successful ones enjoy long and prosperous careers working at a Subway sandwich franchise. The less fortunate majority of them just live on the subway.
by Crazy Old Maurice November 20, 2010