Spank″er (?), n. 1. One who spanks, or anything used as an instrument for spanking.
2. (Naut.) 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. Totten.
3. One who takes long, quick strides in walking; also, a fast horse.
4. Something very large, or larger than common; a whopper, as a stout or tall person.
Spanker boom(Naut.), a boom to which a spanker sail is attached. See Illust. of Ship.