GILES’S BREED. Fat, ragged, and saucy; Newton and Dyot streets, the grand head-quarters-of most of the thieves and pickpockets about London, are in St. Giles’s parish. St. Giles’s Greek; the cant language, called also Slang, Pedlars’ French, and Flash.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
To Giggle * GilflurtNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes