Oh, I thought it referred to Philadelphia to describe an incestual handjob. You know, like… Wait…

Philadelphia has long been nicknamed “The City of Brotherly Love” from the literal meaning of the city’s name in Greek (Greek: Φιλαδέλφεια ([pʰilaˈdelpʰeːa], Modern Greek: [filaˈðelfia]), “brotherly love”), derived from the Ancient Greek terms φίλος phílos (beloved, dear, or loving) and ἀδελφός adelphós (brother, brotherly). The city was first named by its founder, William Penn.

From wikipedia