Moran was born in Navan, Co. Meath in the Republic of Ireland, on November 3, 1971. He attended the St. Patrick's Classical School, where he was first attracted to the idea of stand-up comedy. There, he met fellow Irish comedians Tommy Tiernan and Hector Ó hEochagáin. At 16 years of age, he left school with no qualifications and spent four years 'drinking and writing bad poetry'. He briefly worked as a florist, however, resigned after a week as he hated it.