Journeymen taylors, who on a late occasion refused to work for the wages settled by law. Those who submitted, were by the mutineers styled dungs, i.e. dunghills.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
To Fling * FlipNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes