Amy: Jewelry? Seriously? Sheldon, you are the most shallow, self-centered person I have ever met. Do you really think that another transparently manipul... Oh! It's a tiara! A tiara. I have a tiara! Put it on me, put it on me, put it on me, put it on me, put it on me, put it on me, put it on me.
Penny: You look beautiful
Amy: Of course I do. I'm a princess and this is my tiara.
Sheldon: You were right, the tiara was too much.

Penny: Not knowing's part of the fun.
Sheldon: Was that the motto of your community college?

Bernadette: Gosh, Amy. I'm sensing a little hostility. Is it maybe because like Sheldon's work, your sex life is also theoretical?
Penny: Damn.
Amy: Well, at least, when we do make love, Sheldon won't be thinking about his mother.

Penny: Oh, okay, look. THIS. NEVER. HAPPENED. Do you understand me?
Raj: (nodding)
Penny: Really?! Still can't talk to me?!

Good morning, slut.

Sheldon: Is there any reason you're keeping this dead goldfish?
Penny: Damn, I forgot to feed him and that I had him.
Sheldon: Well, now, did you also have a dog? Because I found what appears to be a battery-operated chew toy.
Penny: Party's over. Party's over.

Penny: That's thinking ahead.
Sheldon: The alternative would be to think backwards.. and that's just remembering.

Penny: All right, try thinking about this -- Sheldon and Amy had sex.
Raj: Shut your ass.

Howard: Tell her I'm really sorry. And if she doesn't want to marry me, I get it. But what I really want her to know is the guy that she is really disgusted by is the guy that I'm disgusted by, too. But, that guy doesn't exist anymore; he's gone. And the reason is because of her. So, if this relationship is over, let her know that she made me a better man, and tell her thank you.
Penny: Oh my god, Howard! That's the most beautiful thing I've ever heard. And it came out of you.

Penny: Hi. Did Sheldon change the Wi-Fi password again?
Leonard: Yeah, it's "Penny already eats our food she can pay for Wi-Fi." No spaces.

Wolowitz [about his phone call]: Looks like I'm going to have sex tonight
Penny: His right hand is calling him?

Leonard: Why would you buy peppermint schnapps?
Penny: Because I like peppermint, and it's fun to say schnapps!

TBBT Quotes

Oh, Bernadette, please play my clarinet.

Raj's poem

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?