12" Gaming Chair
When someone in your game session brags about how good they are and how bad others are at the video game they play. Implying that they are playing the game with a 12" dildo inside of them.
Gamer 1: "lol ur so badddd l2p like me"
Gamer 2: "don't worry about Gamer 1, he's totally on a 12" Gaming Chair"
Gamer 2: "don't worry about Gamer 1, he's totally on a 12" Gaming Chair"