cool fish

• 冷静而大胆的家伙； 脸皮厚的人,怪人

cool fish的用法和样例：

例句

1. That old uncle of yours is a queer fish.
   你那个老叔叔是个怪人。
2. Mary doesn't have any friends because she was a cold fish.
   玛丽是个怪人，她没有什么朋友。