Leonard: Come on, guys, push!
Howard: If I push any harder I'm gonna give birth to my colon.

Howard: *Noticing Raj peeking through someone's window using the telescope* Oh, Raj, no. Billions of dollars have gone into inventing the Internet and filling it with pictures of naked women, so we don't have to peep through windows.

Leonard: She didn't dump me. We were just in different places in the relationship.
Sheldon: I fail to see how a relationship can have the qualities of a geographical location.
Wolowitz: It's very simple. Leonard was living in a little town called "Please don't leave me", while Penny had just moved to the island of "Bye-bye!"

*Raj comes in playing Darth Vader's background music from Star Wars*
Leonard: Would you please turn your shirt off?
Raj: What? I'm giving myself dramatic entrance music. People will know I'm awesome and to be feared.
Wolowitz: Right. There's nothing more awesome and frightening than a man who's got music blasting from between his nipples.

Sheldon: If I'm not taking credit for our work, then nobody is!
Leonard: So, you admit that it's our work!
Sheldon: No, once again I'm throwing you a bone. And once again, you are welcome.
Howard: Oh no he didn't!

Leonard: How can I go out with a woman who believes in psychics?
Howard: Hey, I once dated a girl who believed she was abducted by aliens.
Leonard: And that didn't bother you?
Howard: Au contraire. It meant that she was gullible and open to a little probing.

Dr. Plimpton: Tonight, you are the delivery man, you brought soup, and uh-oh! Raj and I don't have enough money to pay you! So we'll have to come to some other kind of arrangement?
Howard: Beg your pardon?
Dr. Plimpton: You two figure out the details; I'm gonna change into something I don't mind getting ripped off my milky flesh! (goes off to change)
Howard: What the frack?
Raj: Go away. She wants New Delhi, not kosher deli. Besides, you have a girlfriend.
Howard: Yeah, we broke up weeks ago.
Raj: What? Why didn't you say anything?
Howard: I was waiting for the right time; this is a right time.

Sheldon (to himself): Structure, constant structure, one atom.
Howard: Boy, he's really gone, isn't he?
Leonard: Yeah, this morning he used a stick of butter as deodorant.
Howard: I thought I smelled popcorn.

Raj: Okay, show of hands: who's up for this?
(Howard eagerly raises his hand)
Leonard: We'll all be naked, in front of each other.
Howard (lowering his hand): I'm out.

Howard: Are you planning on kidnapping a woman?
Sheldon: Sarcasm?
Howard: Yes, but mixed with genuine concern.

Wolowitz: Good God, what have we done?

Dr. Plimpton: Can I ask you a question Howard? Do you like role-playing games?
Howard: Yeah, sure. In fact, I'm a dungeon master.

Raj: Do you believe you're going to go to hell for eating sweet and sour pork?
Wolowitz: Jews don't have hell. We have acid reflux.

Leonard: What would you guys do if you were me?
Wolowitz: I would take Sheldon to Switzerland.
Leonard: Seriously?
Wolowitz: Absolutely. And I'd leave him there.

Mrs. Wolowitz: Howard it's the phone!
Howard: I know it's the phone ma! I hear the phone!
Mrs. Wolowitz: Who is calling at this ungodly hour?
Howard: I don't know!
Mrs. Wolowitz: Well ask them why are they calling at this ungodly hour!
Howard: How can I ask them when I'm talking to you?