Bashful. A sheepish fellow; a bashful or shamefaced fellow. To cast a sheep’s eye at any thing; to look wishfully at it.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Sheep’s Head * Sheepskin FiddlerNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes