fair game

fair game
    n 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" [syn: {prey}, {quarry},
         {target}, {fair game}]
    

34 Moby Thesaurus words for "fair game":
      a leg up, butt, byword, byword of reproach, chance, clear stage,
      derision, dupe, fair field, figure of fun, fool, game, gazingstock,
      goat, jest, jestingstock, joke, laughingstock, liberty, mockery,
      monkey, occasion, opening, opportunism, opportunity, place, room,
      scope, stepping-stone, stock, target, time, toy, victim