Rum Cove (Grose 1811 Dictionary)
A dexterous or clever rogue.
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.
Rum Cole * Rum Cull
1736 Dictionary of canting and thieving slang
John S. Farmer's collection
canting songs and slang rhymes