While nobody actually refers to Boston as the Hub, or the Hub of the universe, as once coined by writer Oliver Wendell Holmes, you'll find the term in plenty of local writings and city ventures like the Hubway, Boston's bike-sharing program. Dot is Dorchester, the Fens is the Fenway area, Southie is South Boston (not the South End) and Meffa, as plenty of 2 a.m. cab drivers will attest, is indeed Medford.