Small beer, brandy, and sugar: this mixture, with the addition of a lemon, was by sailors, formerly called Sir Cloudsly, in memory of Sir Cloudsly Shovel, who used frequently to regale himself with it.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Flints * Floating AcademyNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes