N-COUNT 笨蛋;傻瓜;无用之人 If you describe someone as a duffer, you mean that they are very bad at doing something. 笨蛋;傻瓜;无用之人 [British, informal, old-fashioned, disapproval]
Waugh was a duffer at cricket.
沃的板球打得很臭。
SYN clot, blunderer [British, informal], booby, clod