Sheldon: What are you doing now?
Howard: Making a straw.
Sheldon: Why?
Howard: So I can shoot you with a spitball.
Sheldon: You're not going to do that, and I'll tell you why. This is an institution of higher learning, I am your professor, and you're going to treat me with the prop... You shot your spit in my mouth!
Howard: Is that gonna be on the test? Because I don't think I could do that again.

Sheldon: What are you doing?
Howard: If you're gonna be a crappy teacher, then I'm gonna be a crappy student.

Sheldon: I recently read that during World War Two, Joseph Stalin had a research program to create supersoldiers by having women impregnated by gorillas.
Howard: What a sick use of science.
Raj: Hey, as long as the baby's healthy.
Amy: I wonder if Stalin considered any other animals.
Leonard: Hippos are the deadliest creature. A half-human, half-hippo soldier would be pretty badass.
Howard: Yes, but when they're hungry-hungry, you can stop them with marbles.
Sheldon: Yeah, the correct animal for interspecies supersolider is koala. You would wind up with an army so cute it couldn't be attacked.

Howard: Creepy chummy, like you and your dog.
Raj: She feeds him out of her own mouth?
Howard: I mean, he calls her Debbie, she calls him Stewie and they're all giggly around each other. And believe me, when food goes in that mouth, it does not come out.

Raj: Boy, I'm so hungry today. I wonder why?
Howard: Because you had sex the other night?
Raj: You know what? That may be it. By the way, it isn't like riding a bike. Like, I fell off a few times.

Welcome to Team Putz.

Bernadette: You know, you're always talking about having a baby someday. This is exactly what it's gonna be like.
Howard: No, it's not.
Bernadette: Come on. The constant fussing, eating, pooping, burping, drooling. We're even waiting for the day when she can finally walk on her own.
Howard: Maybe you're right. Anything she finds on the floor goes right in her mouth.

Raj: If she isn't gonna use it, then why are we doing this?
Howard: She'll use it. All I need is to rig it with a fishing pole and a Honey Baked Ham.

You're being so quiet. Are you upset or are you just rebooting?

Raj: Why can't I be in a relationship with a girl who likes The Sound of Music?
Howard: Raj, you are the girl in the relationship who likes The Sound of Music..

Howard: Oh, come on-- she could have a freezer full of ex-boyfriend's body parts and you'd still go out with her.
Raj: I do like that the ex-boyfriend's out of the picture.

Raj: You know, when Cinnamon won't take her medicine, I hide it in a piece of cheese.
Howard: Good idea. We can wrap the pill in cheese, feed it to Cinnamon, and then my mom can eat Cinnamon.

TBBT Quotes

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.