Priya: Just because you're in bed Indian woman, you think that gives you permission to use crazy positions from an ancient Indian love manual?
Leonard: If you could find a book called "Weird Sex With White Boys," I'd be OK with that.

I live so close I can hear your toilet flush. I don't listen for it, but nice to know everything's OK with your plumbing. In your building.

Leonard

Where am I going to find Uranium-235 this time of night? ... C'mon, Craig's List!

Sheldon

Penny: Not knowing's part of the fun.
Sheldon: Was that the motto of your community college?

Beefaroni and a show? How do you turn that down?

Raj

Leonard: So don't watch TV. Read a book.
Sheldon: And be a social pariah? Now you know that's not my style.

On Thursdays everybody comes over here and has pizza, or a reasonable facsimile prepared by someone claiming to be Luigi but who sounds suspiciously like Jackie Chan.

Sheldon

We could also stop using the letter M. But I think that idea is isguided and oronic.

Sheldon

Indians making Tex-Mex. Might as well have had the Chinese pizza.

Sheldon

Sheldon: Oh what fun. Like hippies at a love-in.
Leonard: Just sit here.
Sheldon: Right on man, right on.

How wonderful, dinner with some assembly required.

Sheldon

This evening I am the Dark Knight roaming these mean streets alone; a windbreaker for my cape and a stern expression for my cowl.

Sheldon

The Big Bang Theory Season 4 Quotes

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.

I don't like the Olive Garden. They treat me like family.

Sheldon