DONKEY DICK. A he, or jack ass: called donkey, perhaps, from the Spanish or don-like gravity of that animal, intitled also the king of Spain’s trumpeter.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Done Up * DoodleNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes