THESAURUS
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
ROGET THESAURUS
fair game
Laughingstock
N
laughingstock, jestingstock, gazingstock, butt, game,
fair game, April fool, original, oddity, queer fish, odd fish, quiz, square toes, old monkey, old fogey, fogey monkey, fogy monkey, buffoon, pantomimist, schlemiel, jest, dum vitant stulti vitia in contraria currunt.