To shake hands: figuratively, to agree or make up a difference. Famgrasp the cove; shake hands with the fellow. Cant.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Fams * Family of LoveNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes