Sheldon: When I first moved here, I was nervous about finding a new barber, so my mother had all my haircut records sent here to Mr. D'Onofrio.
Leonard: There's no such thing as haircut records.

Penny: Sorry, Sheldon, I'll move out of your spot.
Sheldon: Why? My spot, your spot; what difference does it make?

Sheldon: Bongo solo!

Penny: You know, Sheldon, sometimes it's nice not knowing what's coming. I mean, look at me and Leonard. We went out, we broke up, now we're trying again. We don't know what's gonna happen.
Sheldon: Oh, please, everyone knows what's going to happen.

Sheldon: I play bongos while walking down the stairs.
*Sheldon falls*
Sheldon: Never play bongos while walking down the stairs

Leonard: Please don't let this be Sheldon playing bongos.

Leonard: It's 3 in the morning!
Sheldon: 3 in the morning is a good time for bongos.
Leonard: I was sleeping!
Sheldon: Leonard sleep while I play bongos.
Leonard: No, I don't.
Sheldon: Leonard no sleep while I play bongos.

Amy: Before I met you, I was a mousey wallflower. But look at me now. I'm like some kind of downtown-hipster-party girl with a posse, a boyfriend and a new lace bra that hooks in the front, of all things!

Amy: I'll let you in on a little secret. Originally, we were painted nude. But I had him add clothes cause I thought it was an unnecessary challenge to our heterosexuality.
Penny: Yeah, good call.
Amy: But, if you ever change your mind, all it would take is some warm, soapy water and a couple of sponges.
Penny: You're talking about the painting, right?
Amy: Sure.

Raj: I'm glad men are wearing hats again. They are so distinguished.

Sheldon: I'm trying to raise the temperature in here before my nipples tear through my shirt.

Amy: I'm so humiliated. I sat there the whole time that we were watching Grease, thinking you liked the painting.
Penny: I know.
Amy: I was a fool from Summer Lovin' to the very last rama lamma lamma ka dinga da dinga dong.

Barry Kripke: Cooper.
Sheldon: Kripke, come in. I'm making tea. Would you like a cup?
Barry Kripke: Am I weawing a summer frock? No, I don't want tea. Let's get down to brass tacks.

Raj: Hey, look, there's Rothman's empty office. Sad.
Leonard: Yeah.
Sheldon: Mm, indeed.
Howard: So sad.
Sheldon: Dibs.

Kripke: What's up, fellas?
Sheldon: What are you doing here, Kripke?
Kripke: Ah, measuring my new office for drapes.
Sheldon: This is not your office. It hasn't been assigned yet.
Kripke: Well, I called dibs at the Christmas party when Professor Rothman tried to have intercourse with the toys for tots collection box.
Sheldon: Dibs? This is a university, not a playground. Offices are not assigned because someone called dibs.
Leonard: You just called dibs.
Sheldon: Shut it. Offices are assigned by seniority. I arrived at the university first.
Kripke: I arrived at the office first. I'm the proverbial early bird.