Raj: You know, downward-facing dog comes from the Sanskrit phrase adho mukha shvanasana.
Penny: Oh, that's beautiful. What does it mean?
Raj: "Downward-facing dog."
Penny: Yeah, I guess they don't have Sanskrit for "butts up and heads down."
Raj: Hey, we wrote the Kama Sutra. If it involves butts, there's a word for it.

Raj: Amy, good luck getting these guys excited about a dinner with a theme. I gave up when no one cared about my Tom Hanks-Giving.

Raj: Oh man, first monster I see I'm gonna sneak up behind him, whip out my wand and shoot my magic all over his ass!
Stuart: Do you hear yourself when you say these things?

Raj: Doesn't anyone have a rod of resurrection? Because if you've got one, I need it bad. Get in here with your rod and give it to me.
Stuart: Okay, you need to say these things in your head before you say them out loud.

Amy: Wait, are you saying if we combine my experiment with your calculations, we can determine the precise moment in time when the wave function collapses?
Sheldon: It could be the most inspired combination since I mixed red Icee into my blue Icee. It was like drinking 2/7ths of the rainbow.
Amy: Sheldon, this is really interesting.
Sheldon: Yeah and this one won't stain my teeth purple.

Amy: Why don't you ask me what I'm working on?
Sheldon: Oh, very well. What have you been working on? And feel free to honk during the boring parts.

Leonard: Oh, it's just nice to be with people who are happy to have me around. Isn't that right, Halley?
*Halley starts crying*
Howard: Well, at least someone had the courage to say it.