rogue

obsolete The leader of a male band of thieves or gypsies. While one should be wary of the traveling group, the arch rogue who orchestrates them is especially dangerous.

A police collection of pictures of criminals and suspects kept for identification purposes. For example, The detective went through the entire rogues' gallery but couldn't find a match with the suspect . [Mid-1800s]

Originally, a portrayal of a group of disreputable individuals, such as wanted criminals, but later used humorously for any group photograph. The term, also spelled rogue’s gallery, originated in the mid-1800s for a collection of criminals’ portraits. A century later it was used more lightly, as in “Bob Dylan, Arthur Lee, Keith Richard, Bob Marley—the rogue’s gallery of rebel input that forms the hard stuff at the centre of rock” (Kathy McKnight and John Tobler, Bob Marley: The Roots of Reggae, 1977).

Collection of “head shot” photographs. A rogues gallery is a compilation of “mug shot” photos of actual and suspected criminals maintained by police departments for purposes of identification. The practice began in the mid-19th century with the development of photography. By extension, any collection of head-and-shoulder photos, such as college fraternity composites and academic yearbooks, is jokingly referred to as rogues galleries.