Green’s Dictionary of Slang

1. (UK juv.) a soldier.

1984

Partridge DSUE (8th edn) 117/1: children’s, esp. Cockneys; from ca. 1916.

2. (US black) a pistol, rifle or shotgun.

1944		‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.
1960, 1975		Wentworth & Flexner DAS.

3. (US black campus) a cowboy film.

1947

M.H. Boulware Jive and Sl.