Penny: Let's get married?
Leonard: What?
Penny: Leonard Hofstadter, will you marry me?
Leonard: Um....
Penny: Did you seriously just say "Umm..."?

I took a temp job as a waitress forever ago and I can't quit, because guess what? I can't do anything else.

Leonard: Can we talk?
Penny: We can, but the part of "Penny" might get cut.

You didn't get your part cut. You didn't get your part cut. Yep. A bunch of old guys rockinig out in a band, all with erectile dysfunction, you didn't get your part cut!"

Amy: What's the show?
Penny: Um, NC ... II .... Or, you know, NCSTD ... I don't know, it's the one with all the letters and I'm gonna be on it!

Penny: So what do you think.
Sheldon: A tad asymmetrical but nothing to be worried about.

Penny: Oh, that's great. You're gonna be an uncle. Uncle Sheldon.
Sheldon: No. I'll be Uncle Dr. Cooper.

Bark once if you need me to call PETA.

How can you not be happy? You're tall, thin and famous. Oh, my God. I'm jealous of Sheldon.

Penny: "Want of Understanding"? What does that even mean?
Amy: Ding, ding, ding. We have a winner.

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.

Raj: That's horrible. Why would you push a cow over? They're sacred.
Penny: Oh, stop it. I've seen you eat, like, a million hamburgers.
Raj: Hey, an animal can be both sacred and delicious.

TBBT Quotes

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?