Oxford Dictionary English sitting duck nounnoun BrE BrE//ˌsɪtɪŋ ˈdʌk// ; NAmE NAmE//ˌsɪtɪŋ ˈdʌk// (also sitting target) Add to my wordlistjump to other resultsa person or thing that is easy to attack Its location makes the island a sitting duck for attackers.See sitting duck in the Oxford Advanced American DictionaryCheck pronunciation: sitting duck oxfordlearnersdictionaries.com