To waddle: generally applied to persons who have one leg shorter than the other, and who, as the sea phrase is, go upon an uneven keel. Also a jeering appellation for an inferior writing-master, or teacher of arithmetic.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Dopey * DoubleNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes