Sheldon: At one point Raj put on reggae music and his sister took off her shoes. It was like the last days of Caligula.

Sheldon: Will you Boozehounds stop that infernal clinking? And the Answer was Elephant.

Sheldon: I don't think there's anything in this jewelry store that Amy would appreciate more than the humidifier that we were just looking at at Sears.
Penny: Oh, my God, now I know what I sound like to you when I say stupid stuff.

Sheldon: Why don't you just take your clothes down to the river and beat them with a rock.

Sheldon: Let it never be said that Sheldon Lee Cooper ignored the pleas of a damsel in distress.

Sheldon: So Bernadette, if I express interest in your baby will you promise not to make me touch it?
Bernadette: Sure.
Sheldon: Hey, how's life with your baby?
Amy: Really? You're never gonna touch their baby?
Sheldon: To this day I've never touched Stuart.

Howard: So, how do you guys want to play this?
Sheldon: Be ruthless. You tell him if he doesn't start talking, we'll register a complaint with his Internet service provider.
Raj: Sheldon, what if he gets his Internet from his cable company? He could lose his HBO and all their delightful original programming.
Sheldon: I don't care! I'm losin' it, man!

Sheldon: And worse than that, Edison filmed the first on-screen kiss, so he's basically a pornographer. Although every time I put that in Wikipedia, someone takes it out.

Amy: Okay, what's the next test?
Sheldon: Loyalty. We need to choose someone who has our backs, someone who will keep our secrets even from each other.
Amy: Well, I don't have any secrets from you. Do you have secrets from me?
Sheldon: Yes. Oh, that has been weighing on me for years.

Sheldon: You're awfully quiet.
Leonard: Sorry.
Sheldon: No, I like it.
Leonard: Got a lot on my mind.
Sheldon: Would you like to talk about it?
Leonard: Not really.
Sheldon: Grape Nuts for breakfast, quiet car ride, things are really breaking my way today.

Penny: You may be right about me and Leonard.
Sheldon: Of course I'm right What are the odds I'd be wrong twice in one week?
Penny: No, I mean, we can always go back to being friends.
Sheldon: I just said that. This conversation has started to circle. Meeting adjourned.

Amy: Sheldon, it's the American way, the peaceful transfer of power.
Sheldon: I don't know.
Leonard: Think about Ant-Man.
Sheldon: I'm always thinking about Ant-Man.
Leonard: Michael Douglas had the suit and then he passed it on to Paul Rudd.
Sheldon: Maybe you're right.
Amy: Really? The Ant-Man thing? That's what won you over?
Sheldon: Yes. He got the details right. That's how you use a superhero.

Sheldon: Good news, gentlemen. Amy's at a conference this weekend, which means I'm available to be entertained, hmm. As today's youth might put it: Who wants to get their Sheld-on?

Sheldon: Well, then it looks like we have a winner. Congratulations.
Raj: Well, I should warn you, it's just looking at data for hours and hours on a computer screen.
Sheldon: Uh, stop selling it, kid. You won.

Sheldon: It's not the same thing. I don't think you know how I feel at all.
Leonard: Sad?
Sheldon: Hmm, you do get me.