Howard: Ok, now, this is an exact duplicate of The Wolowitz Solid Waste Disposal System, as deployed on the International Space Station.
Raj: Don't you mean the Wolowitz Solid Waste Distribution System?

Raj: Of course you feel terrible. You completely screwed up your karma, dude.
Sheldon: You don't really believe in that superstition, do you?
Raj: It's not superstition. It's practically Newtonian. For every action, there's an equal and opposite reaction. Leonard pretends to be a friend and acts like a two-faced bitch. Therefore, he is reborn as a banana slug. It's actually a very elegant system. You know, what goes around comes around.

Sheldon: Smell that? That's the smell of new comic books. Oh, yes!
Howard: They're on me today, boys.
Raj: You're paying? Have you been selling your sperm again?

Stuart: Uh, hey, Leonard, can I talk to you about something?
Leonard: Oh, sure, what's up?
Stuart: Remember I went out with your friend Penny a couple weeks ago?
Leonard: Yeah, vaguely.
Raj: Sure you remember. You went to the bar and made a fool of yourself trying to pick up strange women.

Raj: If you really want to clean up your karma, go get my freakin' latte.

Raj: Howard, wait. Why don't you use this instead of the PVC to keep the transverse filter assembly in place?
Howard: Because this is not a spare part from the space station. This is the thing from the pizza box that keeps the lid from touching the cheese.
Raj: That what that's for? In India, the lid just touches the cheese. Of course, we also have rampant poverty and periodic outbreaks of cholera, so a little cardboard in our cheese is no biggie.

Raj: I'm telling you, Leonard, video slot machines, free drinks brought to us by a bosomy barmaid and all you can eat shrimp for $3.95. Disneyland can suck it. This is the real happiest place on Earth.

Raj: It's too bad he wasn't here for that hooker. She's exactly his type. A hooker.

Raj: (Reading Howard's tweet) I am so lonely and horny, I may open this $20 jar of peanuts and end it all.

Raj: What's wrong with you dude, that woman was all up in my jammy.
Leonard: Okay, I hate to break this to you and whatever your jammy is, but, I'm pretty sure she is a prostitute.
Raj: What? No.
Leonard: Okay, let me put it this way, in your entire life, how many gorgeous women have walked straight up to you in a bar and asked if you wanted to party.
Raj: Maybe I can save her.
Leonard: Maybe, but I'm guessing it will cost you about $500 an hour to try.
Raj: It was lovely meeting you, best of luck in your future endeavors.

Mikayla: You want the girlfriend experience.
Leonard: Yes, yeah, exactly, the girlfriend experience.
Raj: Uh, actually, if it's not too much to ask, could we have the Jewish girlfriend experience.

Raj: Come on! You know I can't talk to women unless I'm lit up like the Hindu festival of Diwali.

Raj: Lock up your daughters, we're going to hit it and quit it.

Raj: I like Green Lantern, I'm just saying it's pretty lame that he can be defeated by the color yellow.
Sheldon: Only the modern Green Lantern is vulnerable to yellow.
Leonard: Golden age Green Lantern was vulnerable to wood.
Raj: Great, so I can take them both out with a number-two pencil?

Wolowitz: Oh, stop it with the fake third world crap. Your father is a gynecologist and you had a house full of servants.
Raj: We only had four servants, and two of them were children.