To knock down. To ding it in one’s ears; to reproach or tell one something one is not desirous of hearing. Also to throw away or hide: thus a highwayman who throws away or hides any thing with which he robbed, to prevent being known or detected, is, in the canting lingo, styled a Dinger.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
See also the definition in Nathan Bailey's 1736 dictionary of canting and thieving slang.
Dimber Damber * Ding BoyNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes