duff·er
noun/ˈdʌfə(r)/
/ˈdʌfər/
(British English, informal)- a person who is stupid or unable to do anything well
笨蛋；傻瓜；不中用的人 - I was a bit of a duffer at school.
我在学校里有点笨手笨脚的。
Word Originmid 19th cent.: from Scots dowfart ‘stupid person’, from douf ‘spiritless’. - I was a bit of a duffer at school.