Any group of friends whose identity can only be defined as "chill". Anyone who poses, tries too hard, or causes drama is automatically not part of "the crew". There's no initiation, you're either in, or you're not.
Guy #1: What are you doing tonight?
Guy #2: Me and the crew are chillin', probably going to drink some beers.
Guy #1: Dude, what the hell? Why don't you ever invite me over?
Guy #2: Isn't it obvious?