Courage. He wants pluck: he is a coward. Against the pluck; against the inclination. Pluck the Ribbon; ring the bell. To pluck a crow with one; to settle a dispute, to reprove one for some past transgression. To pluck a rose; an expression said to be used by women for going to the necessary house, which in the country usually stands in the garden. To pluck also signifies to deny a degree to a candidate at one of the universities, on account of insufficiency. The three first books of Euclid, and as far as Quadratic Equations in Algebra, will save a man from being plucked. These unfortunate fellows are designated by many opprobrious appellations, such as the twelve apostles, the legion of honor, wise men of the East, &c.
Definition taken from The 1811 Dictionary of the Vulgar Tongue, originally by Francis Grose.
Play * Plug TailNathan Bailey's 1736 Dictionary of canting and thieving slang
John S. Farmer's collection of canting songs and slang rhymes