Leonard, why do you always do this? Listen to me, you are the one that I'm with. You know that I love you. So, will you please relax, because you are driving me crazy.

Leonard: Who you talking to?
Penny: Just this guy I met at school.
Leonard: We're still dating, right?

Sheldon: Get the Mad Hatter on the horn, I'm having a tea party.
Penny: You might want to pace yourself.
Sheldon: I drink tea all the time. I think I know what I'm doing.
Penny: Far be it from me to criticize a man with a full pubis.

Hey, this is my paper. And, my perspective is that slavery is bad. Oh, and my professor's black, so I'm pretty sure that's the right answer.

Amy: You have to be the weirdest couple I know.
Penny: Really? You can't think of anyone weirder?
Amy: I can, [whispers] but she's sitting right there.

Sometimes I forget how smart you are.

Penny: You're unbelievable.
Sheldon: I know.

Amy: Looks like something used by Tinker Bell's gynecologist.
Penny: Who I hope for her sake is not Captain Hook.

Penny: I'm just a blonde monkey to you, aren't I?
Sheldon: You said it, not me.

Penny: We're keeping things, you know, homeostasis.
Amy: It's so cute when she tries.

Sheldon: Penny? Please don't hurt my friend.
Penny: That is the last thing I want to do.
Sheldon: Thank you.

Amy: Soon my upper lip will be the same fake blonde as my beautiful best friend.
Penny: Hey, this is my natural hair color - Now.

TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.