Ok, I changed it again.
I can add that I know what is meta gaming, I try to explain it in a sentence but I’m not good at that in english. I try previously to translate my “definition” from french. Hope this one will be good.
I can add that Metagaming is kind of cheating when we figure out the intention of a player or game master. Taking “surprising” decision in the intention to cheat the game. In some word is to mix IRL with RP to get better issue in the game.