dingbat /ˈdɪŋˌbæt/

• 1. 

  N-COUNT People sometimes refer to a person who they think is crazy or stupid as a dingbat. 疯子; 傻瓜 [美国英语] [非正式]

  例：

  I hope people realize I'm not a dingbat.

  我希望人们意识到我不是个疯子。