Interchangeable with the word owned. This term originated from the MMORPG World of Warcraft, where when your character dies, a box pops up that says "6 minutes to release." (Your spirit is released, which allows you to retrieve your corpse.) On player-versus-player servers, this phrase was abbreviated to "6mtr", which was uttered to signify any character death, but especially as a cry of victory when defeating another player in PvP combat: "I totally ganked that newb, it's 6mtr for him." This acronym was later sounded out phonetically, which produces the term six-meter as a synonym for "ownage." Although it came from World of Warcraft, it's started to spread to people who have no idea of its origins.
1. "Let's six-meter this bitch who's cockblocking us from getting into the dungeon."
2. "Johnny tried to pick a fight with Chuck for stealing his girlfriend, but he totally got six-metered. He had to go to the hospital."