Entry 2 senses Webster, 1913 Ducker /dŭk'-ẽr/ · Duck·er · IPA /dˈʌkər/ 01 n. One who, or that which, ducks; a plunger; a diver. 1. One who, or that which, ducks; a plunger; a diver. 2. A cringing, servile person; a fawner.