WordWeb Online

1. A hitter who slaps (usually another person) with an open hand
   "my father was the designated spanker in our family"
   - slapper
    
2. A fore-and-aft sail set on the aftermost lower mast (usually the mizzenmast) of a vessel

Derived forms: spankers

See also: spank

Type of: fore-and-aft sail, hitter, striker

Encyclopedia: Spanker