Sims 3 is a very addictive role-playing, computer game where you create a family, build their house (or move them into an already created one), and help them play out their livs to the fullest (or the lowest) extent.
Friend: Want to play Sims 3?
Friend 2: What's Sims 3?
Friend: An addictive computer game.
Friend 2: Okay!