This perfectly formed malaphor was uttered by Josh Miller on the radio show The Fan on 93.7 in Pittsburgh (Miller was a former punter for the Pittsburgh Steelers and is now a sports commentator). Miller was discussing the crazy antics of a fan at a baseball game and the nasty comments directed at him. “Open game” is a mashup of “open season” (a period of time when everyone is criticizing someone or something) and “fair game” (something or someone who is considered permissible to attack). The speaker may have had deer season on his mind, thinking of open season on game? A big shout out to John Kooser who heard this one and sent it in!
Trump said this when referring to Jeb Bush. He invoked his former Republican rival because “he’s open game” for not standing by his pledge to support the GOP nominee. “So he signed the pledge, right? But he didn’t honor it,” Trump said. “How do you — how do you live with yourself, you know?” http://www.politico.com/story/2016/10/donald-trump-jeb-bush-230358
This is a mash up of “open season” (a period of time when everyone is criticizing someone) and “fair game” (someone that is considered permissable to attack or abuse). Both idioms involve criticizing someone or something which is the cause of the mix up. A big thanks to Frank King for hearing this one and sending it on!