A prostitute: because she like that animal, covers her back with her tail. Meretrix corpore corpus alit. Menagiana, ii. 128.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Squirish * Squirrel HuntingNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes