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

Howard: I love you. And I'm not just saying that because your breasts are gonna get bigger.

Howard: [Chuckles] Look at that. There's finally a woman in your life you can talk to.

Howard: Oh, man. This is the boutineer from my high school prom. A piece of cake from my Bar Mitzvah.
Bernadette: Did she throw anything away?
Howard: No. If I find my foreskin, I'm gonna kill myself.

Howard: May I say something?
Bernadette: Is it about how I can't have new wallpaper 'cause your dad left when you were little and your mom died?
Howard: Never mind.

Mrs. Wolowitz: Howard! What are you doing in there?
Howard: I'm taking a bath.
Mrs. Wolowitz: I hope that's all you're doing, we share that tub.
Howard: Don't remind me.

Howard: By the way, where did you get that loofah mitt? Yours reaches places that mine just won't.
Penny: You used my loofah?
Howard: More precisely, we used your loofah. I exfoliated her brains out!

Howard: Okay, I get it. I know how the world works. How about if I were to introduce you to the man who freed your people.
Nurse: Unless my people were freed by Benjamin Franklin and his five twin brothers, you are wasting your time.

Raj: Sit, you look like you've had a long day.
Howard: Naw, she always looks like that. ... Because she married an idiot.

Raj: Stop hitting on my lady or you shall experience my wrath.
Sheldon: I am not hitting on her.
Lalita: And I am not your Lady.
Howard: And you have no wrath.

Wolowitz: Whaddup science bitches?

Howard: Aah, this takes me back. Leonard obsessing about Penny. I mean, don't get me wrong, I love your new stuff but, once in a while, it's nice to hear the hits.
Raj: Ooh, ooh, do "our babies will be smart and beautiful." That one always makes me laugh.

Wolowitz: You don't seem to be understanding the English word no. Maybe a different language will help. Russian: Nyet. Chinese: Bu. Japanese: iie. Klingon: qo. Binary-coded ASCII: 01101110 01101111.
Sheldon: It's actually 01100111.

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.

Wolowitz: Take your stinking paws off my popcorn, you damn dirty ape.