Wolowitz: I once dated a girl who believed she was abducted by aliens.
Leonard: And that didn't bother you?
Wolowitz: Au contraire; it meant she was gullible and open to a little probing.

Raj: Come on, let's get a drink.
Sheldon: I don't drink.
Raj: Well I do, and when my wingman is carrying a Green Lantern lantern, I drink a lot.

Sheldon: I'm sorry Raj, I have no desire to salute any article of clothing tonight, much less one that's linked to race riots in the 1940s.
Raj: Race Riots?
Sheldon: The "Zoot Suit Riots?"
Raj: Ohhhh. I always thought that was some sort of after-Christmas sale.

Raj: We'd just see what's what.
Sheldon: That's a semantically null sentence.

Raj: Good news guys, I got the four hour special edition of Watchmen.
Leonard: Got it.
Wolowitz: Seen it.
Sheldon: Detailed analysis posted online.

Beverly: Your Check Engine light is on.
Penny: Yeah, I gotta put a sticker over that.

Excuse me, Leonard, I am the one who is getting a divorce; Mitzi is the one who is dead; why are you the one making a fuss?

Beverly

So, Howard, have you and Rajesh finally summoned the courage to express your latent homosexual feelings towards one another?

Beverly

Leonard: When we watch Frosty the Snowman, he roots for the sun.
Sheldon: Excuse me, but the sun is essential for all life on earth. Frosty is merely a bit of frozen, supernatural ephemera in a stolen hat. A crime, by the way, for which he is never brought to account.

Penny: You know, I could use a drink, you want to stop for a drink?
Beverly: Oh, I don't drink.
Penny: I do. I'll teach you.

Sheldon: It's doubtful that his mother will be over-impressed with a woman whose biggest achievement was memorizing the Cheesecake Factory menu.
Penny: Hey, it's a big menu! There's two pages just for desserts!
Leonard: And those specials, they change every day!
Penny: Okay, it's lame when I say it, it's just ridiculous when you pile it on.

Sheldon: It's a bust of Sir Isaac Newton.
Penny: Oh sure, sure. Very Christmasy.
Sheldon: Well, excuse me, it's much more Christmasy than anything you put on the tree.
Leonard: Here we go...
Sheldon: December 25th, 1642. Julian calendar. Sir Issac Newton is born. Jesus, however, was actually born in the summer. His birthday was moved to coincide with the traditional pagan holiday that celebrates the winter solstice with lit fires and slaughtered guts, which frankly sounds like more fun than twelve hours of Church with my mother, followed by fruit cake.

The Big Bang Theory Season 3 Quotes

Wolowitz: Sheldon. You remember the first few weeks; we were looking for magnetic monopoles and not finding anything, and you were acting like an obnoxious, giant dictator?
Raj: I thought we were going to be gentle with him.
Wolowitz: That's why I added the "tator"

Wolowitz [after seeing Penny jump Leonard]: Damnit, I should have gone over and said we were back
Raj: Yeah, it was "first come, first serve."