To tell or discover. He whiddles; he peaches. He whiddles the whole scrap; he discovers all he knows. The cull whiddled because they would not tip him a snack: the fellow peached because they would not give him a share, They whiddle beef, and we must brush; they cry out thieves, and we must make off. Cant.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Whids * WhiddlerNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes