He was rocked in a stone kitchen; a saying meant to convey the idea that the person spoken of is a fool, his brains having been disordered by the jumbling of his cradle.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Rochester Portion * RogerNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes