We had a pretty batch of it last night; we had a hearty dose of liquor. Batch originally means the whole quantity of bread baked at one time in an oven.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Bat * BattnerNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes