Justin Cathal Geever (born February 21, 1973), known professionally as Justin Sane, is an American musician. He is the lead guitarist, singer and songwriter of Anti-Flag, a punk rock band formed in 1988 in Pittsburgh, Pennsylvania, known for its outspoken left-wing views. Sane holds dual US and Irish citizenship and lives in Pittsburgh. His stage name was bestowed upon him by friends in Pittsburgh's punk scene.
