Penny: What should I have done? Taken a picture of us in the car
and put it in a pink frame with puffy paint around it that says "best fiance ever"?
Leonard: Doesn't sound that bad.
Penny: Well, good, because... that's why I did!

Penny: Wait, hang on-- you guys are gonna work in a mine?
Sheldon: Why not?
Penny: You had a panic attack when we went through the car wash.

Penny: I hate her.
Emily: I hate her.

Penny: Well, I wouldn't exactly call it a hook-up.
Emily: Did you kiss?
Penny: Yeah.
Emily: Were you naked?
Penny: Yeah.
Emily: So, it was a hook-up.

Is this when he says bazooka or something?

I know, watching your boyfriend run around with a broomstick between his legs isn't something you forget.

Okay, that's not what I meant when I said go outside and play

Amy: I'm stimulating the pleasures of this starfish. I just need to turn it off.
Penny: What happens if you don't?
Amy: Then I have to sit through lunch knowing this starfish is having a better day than I am.

Bernadette: Why don't I get you a job at the Sitting Around All Day Wearing Yoga Pants Factory?
Penny: They're comfortable.

Penny: Hi. Want to do yoga with me?
Leonard: Um, let me just have some coffee first, and then I'll have the strength to tell you how much I won't be doing that.

Penny: He'll be okay. You taught him well, Padawan.
Sheldon: Good Lord! Padawan's the student,
not the teacher.
Penny: Seriously, let him go.

Leonard: I know his password, so I can track his phone.
Penny: You do that?
Leonard: Not always, but ever since he wandered off at the swap meet chasing a balloon, I get worried.
Penny: He can take care of himself. Look, we went over stranger danger and gave him that whistle.

TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Raj: Well, to paraphrase Shakespeare: It's better to have loved and lost than to stay home every night and download increasingly shameful pornography.
Penny: Oh... you poor baby.
Raj: What's wrong with me, Penny?
Penny: Nothing, nothing. You know, if we weren't friends - and you hadn't brought up that creepy pornography story - I'd be on you like the speed of light squared on matter to make energy.
Raj: Hey, you totally got that right. E = MC squared.
Penny: I listen. I have no idea what it means, but I listen.