Massively Multiplayer Online Crack House.
This pretty much describes any MMORPG in existance. The unique qualities of these games are comparable to that of a crack house. Users go in, get completely addicted, and find it difficult to leave.
Person 1: So what MMORPG do you play?
Person 2: MMORPG? I play WoW, it's pretty much an MMOCH.