Penny: I'm a little low on cash.
Leonard: How much you got?
Penny: Nothing.
Leonard: How can you walk around with no money?
Penny: I'm cute, I get by.

Penny: You wanna turn yourself into some sort of robot?
Sheldon: Essentially, yes.
Penny: Okay, here's my question: Didn't you already do that?

Penny: (To Howard and Raj) So either one of you weirdos wanna buy my underwear? Only 1400 bucks.

Penny: Damn you, you rat bastard! In the olden days, I never would have known he was that stupid.

Penny: Okay, Babydoll Pink, let's see if you can cover up the fact that I got my dad's feet.

Leonard: Can I sleep on your couch tonight?
Penny: Well, you can try. But the neighbors across the hall are being very noisy.
Leonard: Oh, you heard that, huh?
Penny: Yeah, apparently the one fella changed the thermostat, and then the other fella went bat-crap crazy.

Penny: So Sheldon's last roommate tried to warn you off?
Leonard: For all I knew, he was the crazy one. He had this really deranged look.
Penny: Well, yeah. He'd been living with Sheldon.

Penny: Why on earth did you agree to all that?
Leonard: It was the best apartment I'd seen, the rent was very reasonable and after you've passed the first three barriers you kind of want to take it all the way.
Penny: Well, I'm sorry, Leonard, it's very hard to feel sympathy for you.

Leonard: Not only did Sheldon save my life, he didn't rat me out to the landlord. Or the police. Or Homeland Security.
Penny: Okay, so, basically, you're the reason I have to walk up and down three flights of stairs every day?

Penny: Sheldon, what are you doing with maxi pads?
Sheldon: I have a lady friend who will be staying with me for a few days.
Penny: Oh. What?
Sheldon: I want her to feel at home. I also bought scented soaps, pantyhose, Midol, calcium chews and what is apparently a yogurt specifically designed to regulate the female bowel.
Penny: Wait, wait, hold on, back up. You're having a woman stay with you?
Sheldon: Yes. Why does that seem to flabbergast everybody?
Penny: Oh, no, no, no, no. I'm not flabbergasted. I'm puzzled. Yeah, let's go with puzzled.

Penny: Oh, good, you're up. Look, my car won't start. I need a ride to work.
Sheldon: Did you once again ignore your check engine light?
Penny: No, Mr. Smarty Pants. I ignored the fill gas tank light.
Sheldon: Leonard, Penny wants to exploit any residual feelings you have for her in order to get a ride to work.

Penny: You know what? I'm just gonna take the bus to work.
Leonard: Penny, I can still drive you.
Penny: Oh, no, no, it's okay. You might slip on a banana peel and get me pregnant.

Penny: Oh, damn, they canceled my Visa. Oh, yay, a new MasterCard.

Penny: God, can we please just say no longer seeing each other?
Sheldon: Well, we could if it were true. But as you live in the same building, you see each other all the time. The variable which has changed is the coitus.
Penny: Okay, here’s the protocol, you and I are still friends, and you stop saying coitus.

Penny: Do or do not do there is no try.
Leonard: Did you just quote Star Wars?
Penny: I believe I quoted The Empire Strikes Back.