PhillyyoudaoicibaDictYouDict[Philly 词源字典]
familiar or colloquial shortening of Philadelphia, attested by 1890, but from 1858 as the popular name of a ferry boat of that name that crossed the Delaware River from the city to Camden, and a city baseball team has been the Phillies since 1883.[Philly etymology, Philly origin, 英语词源]