[BOB sb.7] (See quot. 1785.)
1785. Grose, Dict. Vulgar Tongue, Light bob, a soldier of the light infantry company.
1802. in C. James, Milit. Dict.
1821. Blackw. Mag., X. 618. Our active light-bobs, and our bold grenadiers. Ibid. (1828), XXXIII. 189. On then we went, great guns and small, lightbob and grenadier.