A gentleman. A well-dressed map. The flashman bounced the swell of all his blunt; the girl’s bully frightened the gentleman out of all his money.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Sweetness * Swelled HeadNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes