situations outside the mechanisms of a game that effect the outcome of that game or even other games. Some gamers carry grudges from one game to the next and target the player who beat them in the last even though nothing in the second game necessitates this. Found on http://www.pubmeeple.com/gaming-glossary/
To use reasons not strictly related to the game at hand to change one’s playing style and attitude towards other players. Choosing to attack player A instead of player B simply because player A owes you money is an extreme example of metagaming. Found on https://boardgamegeek.com/wiki/page/Glossary