chump
noun [ C ] old-fashioned informal uk/tʃʌmp/ us/tʃʌmp/
傻瓜，笨蛋，呆子
a silly or stupid person
[ as form of address ] You chump! Why did you tell her that? 你这个呆子！干嘛告诉她那件事？
Idiom
be off your chumpidiom UK old-fashioned informal 发疯，发傻，呆头呆脑
to be extremely silly or stupid