Penny: Ah, I feel just like Mother Teresa. Except for the virgin part. That ship sailed a long time ago.
Bernadette: I think Mother Teresa would have washed the clothes first.
Penny: Yeah, well, I bet her laundry room wasn't down five flights of stairs. You know, giving really is better than receiving. I used to think it was such a cliché, but it seems to be the… oh, look at these cute jeans someone just threw away.
Bernadette: Donated.
Penny: Yes, to a poor waitress who loves a boot cut.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Raj: [to Amy] If you were having Sheldon's baby, would you really want him in the room?
Penny: Yeah, if he's in the room when they're making the baby, I'll give you $10.

Penny: I mean, who even reads Scientific American?
Leonard: It's kind of a big deal.
Penny: If it's such a big deal, how come the biggest celebrity they could get for the cover is a molecule?

Leonard: Do you think we can outrun him?
Sheldon: I don't need to outrun him, I just need to outrun you.

Penny: Did Sheldon change the Wi-Fi password again?
Leonard: Yeah, it's "Penny already eats our food she can pay for Wi-Fi". No spaces.

Sheldon: I'm not going to say I told you so, but we could have killed him.