fair game
noun/ˌfeə ˈɡeɪm/
/ˌfer ˈɡeɪm/
[uncountable]- if a person or thing is said to be fair game, it is considered acceptable to play jokes on them, criticize them, etc.
可开玩笑（或嘲弄、作弄）的对象 - The younger teachers were considered fair game by most of the kids.
多数小孩认为年轻教师是可作弄的对象。
- The younger teachers were considered fair game by most of the kids.