The story tells of a "spy boy" or "spy dog" i.e. a lookout for one band of Indians encountering the "flag boy" or guidon carrier for another band. He threatens to set the group's flag on fire.
Interestingly, Dr John started his music career as a guitarist until his left index finger was damaged by a gunshot while defending a fellow musician.
Dr John injects his usual New Orleans creole drawl to great effect.
Dr John - Iko Iko