Ganpati Bappa Morya translates as “O father Ganesha”.
Ganesha Chaturthi is a Hindu festival celebrated in India and in countries with huge Indian dispora. The festival honors the god Ganesha, recognizable by his elephant-head. Ganesha is the remover of obstacles and the god of beginnings and wisdom.
During the festival of Ganesha Chaturthi, it is customary to honor Ganesha by screaming “Ganpati Bappa Morya.”
Ganapati is Sanskrit word which means composed of two individual words, ‘gana’ and ‘pati’. ‘Gana’ means group or multitude, while ‘pati’ means lord or ruler. Hence, ‘Ganapati’ means ‘ruler of many’. The word is often used as a synonym for Ganesha.
Bappa is a Marathi word, which means ‘father’; hence, calling Ganesha our father.
Morya is a bit tricky. Legend goes that there lived a saint called Morya Gosavi, who was a devout believer and follower of Ganesha. Historical sources put Morya as living between the 13th and 17th century. He devoted his life to Ganesha, and after a tough penance he was granted a boon by Ganesha. Morya asked that his name always be associated with Ganesha. So Ganesha decrees that every time the name of Lord Ganesha is called out, it should be followed by Morya. Hence, it is. There is no actual definitive meaning for Morya.