Faugh a Ballagh (/ˌfɔːɡ ə ˈbæləx/ FAWKH ə BAL-əkh; also written Faugh an Beallach) is a battle cry of Irish origin, meaning "clear the way". The spelling is an 18th-century anglicization of the Irish language phrase Fág an Bealach [ˈfˠaːɡ ənˠ ˈbʲalˠəx], also written Fág a' Bealach. Its first recorded use as a regimental motto was by the 87th (Prince of Wales's Irish) Regiment of Foot (who later became the Royal Irish Fusiliers) in 1798. It remains the motto of the Royal Irish Regiment today.
It was adopted due to the blood curdling battle-cry of Sergeant Patrick Masterson as he tore into the French ranks, with Ensign Keogh, to capture the first French Imperial Eagle to be taken in battle – during the Battle of Barossa. He was then heard to cry 'Be Jabers Boys! I have the Cuckoo!' as he held it triumphantly aloft to rouse the spirits of his men. Ensign Keogh did not survive the daring dash into the French ranks.