Counterfeit sleep: cats often counterfeiting sleep, to decoy their prey near them, and then suddenly spring on them.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Cat’s Paw * Cat SticksNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes