dingbat
noun [ C ] uk/ˈdɪŋ.bæt/ us/ˈdɪŋ.bæt/
(PERSON)
informal笨蛋，傻瓜
a stupid or easily confused person
Edith may seem like a dingbat, but she's actually pretty clever. 伊迪丝或许看起来有些笨，但实际上却非常聪明。
It made him look like a total dingbat.