spanker

n. 1. One who spanks, or anything used as an instrument for spanking. [ 1913 Webster ]

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. [ 1913 Webster ]

3. One who takes long, quick strides in walking; also, a fast horse. [ Colloq. ] [ 1913 Webster ]

4. Something very large, or larger than common; a whopper, as a stout or tall person. [ Colloq. ] [ 1913 Webster ]

Spanker boom (Naut.), a boom to which a spanker sail is attached. See Illust. of Ship. [ 1913 Webster ]