Oh, how about Rocket Man?

Howard: You can't do "Buzz." Buzz is taken
Raj: Buzz Lightyear is not real.
Howard: No, that's not what I'm talking about.
Raj: Well, are you talking about when he thought he was real?
Howard: No

Howard: I got pretty exciting NASA news today. Next week I fly to Houston for orientation and zero-gravity elimination drills.
Penny: What does that mean?
Bernadette: He's gonna to learn to poop in space.
Howard: Open the pod bay doors, HAL.
Raj: Maybe your nickname should be "Brown Dynamite."

Raj: They put you under for a cleaning?
Sheldon: They have to -- I'm a biter.

If I had one, mine would be "Brown Dynamite."

I can't believe I bought my soul mate at Glendale Galleria.

Raj: I'd like for you to call me sexy.
Siri: [chimes]From now on, I'll call you sexy. Okay?
Raj: Okay!

Raj: Whoa! What's your hurry, cowboy? Savor the moment.
[Raj and Howard slowly remove the plastic off Raj's new iPhone 4s]
Howard: Oh, yeah.

Sheldon: Now, back to our game.
Raj: You were in the middle of an erection.
Sheldon: Oh, of course. It's right here in my hand.

Raj: Did you forget what Penny did to you? It took two years and defiling my sister to turn that frown upside down.
Leonard: I didn't defile your sister, we had a relationship.
Raj:I heard you called her Brown Sugar. In my book, that's defilement.

Sheldon: I want to build a road, but I need wood. Do either of you fellows have wood?
Raj and Howard: [Both chuckling]
Sheldon: I don't understand the laughter. The object of Settlers of Catan is to build roads and settlements. To do so requires wood. Now I have sheep; I need wood. Who has wood for my sheep?

I'm telling you dude there's a seat on the Hogwart's Express with your name on it.

TBBT Quotes

Sheldon [to Kripke]: Also, I am given to understand that your mother is overweight.
Raj: Oh, snap.
Sheldon: Now of course, if that is the result of a glandular condition and not sloth and gluttony then I withdraw that comment.

How is "doable" anything but a compliment?

Wolowitz