Speech, discourse. Give us none of your jaw; let us have none of your discourse. A jaw-me-dead; a talkative fellow. Jaw work; a cry used in fairs by the sellers of nuts.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Jason’s Fleece * JazeyNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes