I'm not going to the mall with someone dressed like a dumb space bear.

Penny: Hey, how come you've never done anything romantic to celebrate our first date?
Leonard: Well, for starters, you've broken up with me so many times, which first date are we talking about?

Sex doesn't count.

Penny: Just you wait and see. I'm gonna romance your freakin' ass off.
Leonard: That's beautiful. Is that Shakespeare?

Penny: Okay, look, here, page 58. I oil-wrestle an orangutan
in a bikini.
Leonard: Just to clarify, which one of you is wearing the bikini?
Penny: Both of us.
Leonard: So it's a family film.

Penny: Wait. What's wrong with geology?
Sheldon: Let me put this in a way you'll understand, Penny. You remember how you explained to me that the Kardashians aren't real celebrities? Well, geology is the Kardashians of science.

Leonard: What happened?
Penny: Well, I went over to Mike's to make up with him.
Leonard: Yeah. No, I know that part.
Penny: But he had already moved on.
Leonard: Already? That was quick.
Penny [crying]: That's what I said to the woman who had her legs wrapped around his neck!

I may be a bad waitress, but you're a bad person. Now, want to hear the specials?

Penny: I swear to God, I am done with guys like that. You know, macho with the perfect body and hair, and money.
Leonard: Yeah, that must get old quick

Penny: I was just wondering if I could talk to you. It's about Leonard.
Sheldon: Why me? Why not Koothrappali or Wolowitz?
Penny: Well, Raj can't talk to me unless he is drunk, and Wolowitz is, you know, disgusting

Penny: We had one of those silly fake weddings.
Leonard: Penny ... you know those are real, right?
Penny: No, they're not.
Leonard: Yeah, they are.
Penny: No, they're not.
Leonard: Yeah, they are.
Sheldon: He's right.
Amy: They're real.
Penny: But, it didn't seem real.

Penny [on phone]: How about this, you keep him there a little longer, and when you get to the party, I'll point out which of my friends are easy.
Wolowitz: ... Don't toy with me, woman.
Penny: I got a hot former fat girl with no self-esteem, I got a girl who punishes her father by sleeping around, and an alcoholic who's two tequila shots away from letting you wear her like a hat.
Wolowitz: Thy will be done

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?