Amy: Okay, that's enough.
Penny: What? No! I really want to know what happens-- and Bernadette really, really, really wants to know what happens.

Penny reading Amy's book: "Amelia stood before the newly repaired time machine.She regretted giving Cooper the part he needed."
Bernadette: Because she wanted him to give her the part she needed.

Leonard: Stephen Hawking liked our paper. Said the premise is intriguing.
Sheldon: Good to see you again, Mr. Stephen-Hawking- Liked-Our-Paper.
Leonard: And you as well, Mr. Our-Premise-Is-Intriguing.
Howard: How do you do, Mr. I'll- Admit-That's-Pretty-Cool?
Raj: Yeah, you keep setting me up for failure.

Sheldon: Professor Hawking?
Professor Hawking: Oh, brother, you should see the look on your faces.
Leonard: You really didn't like our paper?
Professor Hawking: I like your paper very much. The premise is intriguing.
Sheldon: Then why are you attacking us?
Professor Hawking: If you were sitting in a chair for 40 years, you'd get bored, too. Anyway, got to go. I promised to help the neighbor kid with his math homework. Ciao.

Penny: You look like a talking cupcake!
Pageant Bernadette: And you should pick me for Miss California Quiznos 1999, because I want to...Tell you what I want, what I really really want I'll tell you what I want, what I really really want I wanna, I wanna, I wanna, I wanna Really, really, really be Miss California Quiznos 1999!

You mess with the bull, you get the horns. I'm about to show this guy just how horny I can be.

Sheldon

Leonard: Uh, another one says, "The concept shows some real out-of-the-box thinking".
Sheldon: Do you hear that, Mr. Out-Of-The?
Leonard: I do, indeed, Mr. Box-Thinking.

Leonard: You're sure it's good?
Sheldon: My name is right on there with yours. That is a surefire
mark of quality. That might as well say "Directed by Joss Whedon".
Leonard: Okay, partner, let's do it.

Leonard: You wrote a paper on my idea?
Sheldon: I wrote a paper on our idea.
Leonard: When did my idea become our idea?
Sheldon: When I mixed it with Sheldony goodness and cooked it in the Easy-Bake Oven of my mind.
Leonard: This is good. Our idea is really good.
Sheldon: Well, the light bulb in this oven is ridiculously bright.

Leonard: You're giving me a sticker?
Sheldon: Not just a sticker. That is a sticker of a kitty saying, "Me-wow!"
Leonard: I'm not a preschooler.
Sheldon: Fine, I'll take it back
Leonard: I earned this! Back off!

Leonard: This... is exciting. This is really exciting. I have to go find Sheldon.
Penny: Okay, well, if you find him, use the kitchen island- that coffee table will not support both of you.

Penny: Yeah, I listen to what you say. You're building a particle detector using superfluid helium.
Leonard: You know, when you talk like that, I want to take you right here on this table.
Penny: And you know from past experience this table cannot support both our weight.

TBBT Quotes

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.

Sheldon: Even the dung beetle chooses to plot its course by using the Milky Way.
Raj: Is that true?
Sheldon: Everything I say is true. Now, of course, the dung beetle also enjoys eating fece, living in feces and making little balls out of feces. So, pick and choose which aspects of its lifestyle you want to embrace.