Sheldon: That's a lot of belt buckles.
Howard: Funny thing is, I only have one belt.

Sheldon: Am I wasting my life on a theory that can never be proven?
Howard: Maybe. But how great is Game of Thrones?

Bernadette: You're so brave, I'm proud of you
Howard: I ate a butterfly. It was so small, beautiful.... I was so hungry.

Wolowitz: Sheldon knows football?
Leonard: Apparently.
Wolowitz: I mean, Quidditch, sure. But football?

Leonard: [Sheldon] says he's moving out.
Raj: What did you do? Did you change the contrast or brightness settings on the television?
Leonard: No.
Raj: Did you take a Band-Aid off in front of him?
Leonard: No.
Wolowitz: Did you buy generic ketchup? Forget to rinse the sink? Talk to him through the bathroom door?

No. My mom died.

How is "doable" anything but a compliment?

Bernadette: Are those Russian rockets safe?
Howard: Well, I mean, safe as it can be when it was build by the good folks who brought you Chernobyl.

I need you to be honest with me. Do my boobs look bigger to you?

My wife came with both fun bags and money bags.

Howard: What were they thinking putting Doctor Octopus's mind in Spider-Man's body?
Raj: Well, I've been quite enjoying that. It combines all the superhero fun of Spider-Man with all the body-switching shenanigans of Freaky Friday. Both versions: original and Lohan.
Howard (imitating Raj): "Both versions: original and Lohan."

Howard: Hey, we're here to support you, buddy.
Leonard: No, you're not. You're here to see if I get my underwear pulled over my head.
Howard: You wore underwear? You fool.

TBBT Quotes

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

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon