Sheldon: You're 15th favorite technological visionary.
Steve Wozniak: Only fifteenth?
Sheldon: It's still six spots above Steve Jobs. I care neither for turtlenecks nor showmanship.

Penny: Can I ask you a question?
Sheldon: Given your community college education, I encourage you to ask as many as possible.

Raj: You slipped and fell into a robot hand?
Wolowitz: Yes.
Raj: Penis first?
Wolowitz: Yes. Now help me!
Leonard: I'd suggest a lubricant, but I have a feeling you fell on some of that as well.

Penny: OK. Well, then, there's a couple of things you should probably know.
Sheldon: I have a master's degree and two doctorates. The things I should know, I do know.

Sheldon: Amy pointed out that, between the two of us, our genetic material has the potential of producing the first in a line of intellectually superior, benign overlords to guide humanity to a brighter tomorrow.
Wolowitz: I'm guessing that future historians will condemn us for not taking this opportunity to kill Sheldon.

Apparently, a semi-incestuous Teens for Jesus hoedown didn't count.

Sheldon

Penny: You have nice hair.
Amy: Are you a homosexual?
Penny: No!
Amy: Would have been more flattered if you were a homosexual.

You have broad hips and a certain corn-fed vigor. Is your womb available for rental?

Sheldon

At best, it's a modest leap forward from the technology that gave us Country Bear Jamboree.

Sheldon

I don't object to the concept of a deity, but I'm baffled by the notion of one that takes attendance

Amy

Howard wanted to write "mumbo jumbo," but I said no, our Sheldon would say "hokum."

Raj

That's not afternoon. That's prevening.

Sheldon

TBBT Quotes

Oh, Bernadette, please play my clarinet.

Raj's poem

Sheldon: I'll have a diet Coke.
Penny: Can you please order a cocktail? I need to practice mixing drinks.
Sheldon: Fine... I'll have a virgin Cuba Libre.
Penny: That's... rum and Coke without the rum.
Sheldon: Yes, and would you make it diet?