Amy: What if we have a code word?
Sheldon: Ooh, now you're speaking my catamaran. That's my code word for "language."
Amy: Okay, fine, catamaran. That's our code word.
Sheldon: No, that's my code word. Get your own.

Penny: So Leonard, tell everyone your news.
Leonard: Oh, oh, I'm starting a book.
Sheldon: That would be big news from Penny, but you've read a book before.

Leonard: Yeah, did Sheldon send it to you?
Penny: Amy did. I solved it already.
Leonard: Really?
Penny: Yeah. Same way I solved my jury duty summons, I threw it away.

Sheldon: [cell phone rining] Oh, dang it. Hello, Mother.
Mary Cooper: Hi there, Shelly. You will never believe who I ran into at the barbecue festival.
Sheldon: I am right in the middle of some very important work. I don't have time for this right now.
Mary Cooper: Then why did you answer the phone?
Sheldon: Because you raised me to be polite. Now stop bothering me. [hangs up]

Leonard: I'm sorry, we don't have to do more experiments. Let's do something we can all enjoy.
Amy: Hey, uh, you want to watch that show you like where people want to buy a house and then they do?

Howard: You know, fun fact, did you know baby boys can pee straight up?
Raj: Grown-up boys, too.
Leonard: Why would we high-five that?

Leonard: Wait, what? I scrubbed sludge for you. I may be slightly radioactive.
Sheldon: Oh, you're exaggerating. Don't let him touch the silverware.

Amy: I'm sorry, Sheldon, but with minimal power comes minimal responsibility. And you couldn't handle it.

Leonard: When I said you should make a playlist for the road trip, I meant music.
Sheldon: This is better than music, this is a lecture on nonlinear time.
Raj: Sounds like it's just on regular time.
Sheldon: Yes, but I put it on shuffle.

Penny: No, there's something fuzzy.
Howard: Is it your teen years?
Penny: No. Yes. Shut up.

Leonard: Yeah, you-you just have to be patient.
Sheldon: But what if while I'm being patient, someone more relentless than me badgers their university into giving them money?
Howard: If there's someone more relentless than you, I'd like to meet them.
Leonard: I would not.

Penny: There is a lot of room between "don't like" and "hate." You know, it's-it's where you find rice pudding and jazz.

Penny: Look, Amy, I don't know what to say. I think I got stuck on the fact that it's not a dress I would choose, but it shouldn't be. You know, it's your dress. I mean, hey, would you marry Leonard?
Amy: Ew.
Penny: Okay, a simple "no" would have been fine, but you see my point.

Amy: Why do you smell like smoke?
Sheldon: I was in Vegas.
Amy: Vegas?
Sheldon: I'm sorry. Las Vegas.

Sheldon: Oh, maybe it's fine if she doesn't come to the wedding. I've got Amy now, and she can do everything a mom can do and more.
Leonard: Say that to her on the wedding night. Really spice things up.