Penny: This is really sad, and in a different way than it was twenty minutes ago.

Penny: Well, my beer isn't flat and my rack's not saggy, so far the future's great.

Penny: No, come on, I wanna do it. Let's you, me and your very, very pale feet make some art.

Penny: Oh, sweetie, you should really get some money.

Howard: We're going to see Richard Feynman. Penny, Richard Feynman is an iconic phys-
Penny: I know who he is. Leonard dressed as him for Halloween last year.

Raj: Boo-hoo. You know what you sound like? Babies. Two whiny babies. And there's nothing worse than being stuck with two whiny babies!
Howard: Oh. Oh, my God, I'm gonna have two babies.
Raj: No, no, no, no. Babies are great. You're lucky to have two babies. I mean, look at me, uh, I'm all alone.
I'm never gonna have babies, 'cause you can't make a baby watching Netflix with your dog.
Penny: Thanks for coming.

Leonard: If you don't like this Christy, why are you letting her stay?
Penny: Well, she was engaged to my cousin while she was sleeping with my brother, so she's kind of family.

Penny: You mean, like a date?
Leonard: Not like a date, a date.

Leonard: Hey, can you think of a reason why I shouldn't invite Amy to come with me?
Penny: No.
Leonard: Come on, you didn't even try.

Penny: You look like a talking cupcake.

Penny: What's the word, hummingbird?

Penny: I meant more like a little brother.
Sheldon: Oh. Well, I suppose I do think of you like a sister. And sometimes a mother.
Penny: It's getting creepy again.

Penny: Oh, he's cute!
Bernadette: Doesn't a teardrop tattoo mean he murdered someone?
Penny: And he's sad about it.

Penny: Fine. You think you know so much. Who's my favorite Spice Girl?
Leonard: Baby.
Penny: Who's my favorite member of NSYNC?
Leonard: Justin.
Penny: Who's my favorite Backstreet Boy?
Leonard: (Scoffs) Nice try. NSYNC forever.
Penny: Damn it!

Penny: Uh-oh, somebody's still pouting.
Leonard: Leave me alone.
Penny: If it's because you lost a stick, I know where it went.