Overall, I think the Boss sligh deck is one of the more degenerate things in standard and it steamrolls all the top deck
What is a "metagame"?
Metagaming -
Metagaming is any strategy, action or method used in a game which transcends a prescribed ruleset, uses external factors to affect the game, or goes beyond the supposed limits or environment set by the game. Another definition refers to the game universe outside of the game itself.
The highest level of strategy in many complex games, metagame refers to any aspect of strategy that involves thinking about what your opponent is thinking you are thinking.
Metagame comes into play in any game where no single strategy is dominant and opposing
sides are aware of multiple strategies that can succeed dependent upon opponents' actions. In order to perform at the highest level, it then becomes necessary to think about what your opponent thinks you will do (which may depend on what he thinks you think he thinks he will do, etc.) and to make decisions based on clues regarding what level they are thinking on.
This term is most commonly used to refer to poker and other complex card games, but is increasingly being used in relation to video games with complicated player vs player elements and even traditional sports.
Ex-
"Normally I would raise the flop with this hand as a semi-bluff, but I've been so aggressive lately that taking metagame into consideration I think he will go all-in with any pair, so instead I'm going to fold."
Ex-
"This guy thinks that I'm going to zergling rush which means he will waste resources defending early. Instead I am going to focus on resource development for mid game, and metagame will win me this
match. "
"Meta" is short for metagame. You've been using the term correctly.