flag guns

Noun

flag gun (plural flag guns)

1. (UK) A gun in an artillery train bearing a flag.
   • Major Lawrence returned answer, 'that the English colours were carried on the flag gun of their artillery, which if Mons. D'Aotenil would look out for, he might thence discover where the English were posted ; and that, although he was as unwilling as himself to spill European blood, yet if any...1814, Edward Wedlake Brayley, The Beauties of England and Wales: or Original Delineations, Topographical, Historical, and Descriptive, of Each County, volume 10, London, page 717
2. A humorous prop gun which unfurls a small flag when its trigger is pulled.
   • "I'm going all out with the props. A rubber fish with a big smile, a bang flag gun, and a kazoo. . . ."2008 October 14, Mike, “Wanna know how I got these scars? They were $3.49 . . .”, in The Sockpuppet Asylum