Massive Multiplayer Online Role Playing Game. The rather long acronym for the most popular types of games in the world. The key features that separate these from other games are:
1) monthly payments
2) constantly changing game
3) seasonal events
4) the ability to talk to, trade with, fight and team up with other players
5) non-linear gameplay
6) an illogical stereotype about people getting addicted to them, being fat and unhealthy.
Although it is true that they are slightly to fairly addictive in some cases, due to the natural human urge to better yourself, it is only a minority of people that this actually affects, and they have to be weak minded enough to convince themselves that games are more important than social lives. However, contrary to popular opinion, in moderation, they are much better than watching TV as most critics of them tend to do in their spare time as they improve reaction times, memory, reasoning and tactical thinking.
Bob: "You're such a nerd for playing an MMORPG Phil. You should really quit".
Phil: "Quit? And sit there watching American Idol and shouting at the TV? No thanks".