scallywagPronunciation: /ˈskalɪwag/ (North American also scalawag /ˈskalə-/)Definition of scallywag noun informal 1a person, typically a child, who behaves badly but in an amusingly mischievous rather than harmful way; a rascal: that scallywag of a son of yours 2US a white Southerner who collaborated with northern Republicans during the post-Civil War reconstruction period. Origin: mid 19th century: of unknown originscallywag in other Oxford dictionaries Definition of scallywag in the US English dictionary