A person that spends 99.9% of their free time playing MMORPGs (Massively-Multiplayer Online Role-Playing Games) such as Everquest and World of Warcraft. It is common for neglectful MMORPGers to forget about their family and friends.
Kid: "Damn dad quit being a dick. You've been ignoring mom all day."
Dad: "What the hell are you talking about? I'm in the middle of a raid. Leave me alone kid."
Kid: "You're such a neglectful MMORPGer."