Claire Standish: You know why guys like you knock everything?
John Bender: Oh, this should be stunning.
Claire Standish: It's because you're afraid.
John Bender: Oh God, you richies are so smart, that's exactly why I'm not heavy into activities.
Claire Standish: You're a big coward.
Brian Johnson: I'm in the math club.
Claire Standish: See, you're afraid that they won't take you, you don't belong, so you have to just dump all over it.
John Bender: Well, it wouldn't have anything to do with you activities people being assholes, now would it?
Claire Standish: Well, you wouldn't know, you don't even know any of us.
John Bender: Well, I don't know any lepers, but I'm not going to run out and join one of their fucking clubs.
Andrew Clark: Hey. Let's watch the mouth, huh?
Brian Johnson: I'm in the physics club too.
John Bender: Excuse me a sec. What are you babbling about?
Brian Johnson: Well, what I had said was I'm in the math club, uh, the Latin, and the physics club... physics club.
John Bender: Hey, Cherry. Do you belong to the physics club?
Claire Standish: That's an academic club.
John Bender: So?
Claire Standish: So academic clubs aren't the same as other kinds of clubs.
John Bender: Ah... but to dorks like him, they are. What do you guys do in your club?
Brian Johnson: Well, in physics we... we talk about physics, properties of physics.
John Bender: So it's sorta social, demented and sad, but social. Right?
There's a reason this movie is still relevant 20 years after it's release. This scene jumped off the page when I read it.