[noun](slang)(from the way ducks return to the same place and are thus easy to hunt) a mark or easy target for a swindle, someone who is likely to lose at gambling or other competition
[noun](slang)(from the good flavor of duck meat) short for 鴨の味(kamo no aji, “duck flavor”): a very good flavor; by extension, any remarkably good sensation or feeling, particularly describing happy marriedlife