Spanker — One who spanks, or anything used as an instrument for spanking.
Spanker — The after sail of a ship or bark, being a fore-and-aft sail attached to a boom and gaff; -- sometimes called driver. See Illust. under Sail.
Spanker — One who takes long, quick strides in walking; also, a fast horse.
Spanker — Something very large, or larger than common; a whopper, as a stout or tall person.
Spanker — A small coin.