Fair Game
WordNet
noun
(1) A person who is the aim of an attack (especially a victim of ridicule or exploitation) by some hostile person or influence
"He fell prey to muggers"
"Everyone was fair game"
"The target of a manhunt"
WiktionaryText
Noun
fair game
- Actions permissible by the rules.
- Pretending to be slow is fair game. Pretending to be injured is not.
- The referee ruled the unprecedented play fair game.
- An goal or object that may legitimately be sought.
- After the middle sister's call from a friend's house, her slice of cake was fair game.
- A game that is fair, that does not involve cheating etc.