Penny: "50 cents off Vagisil"
Sheldon: Think of me when you apply it.

Penny: He's still mad at Leonard, huh?
Amy: Well, he's mad at you, too. He said you were the succubus that led his friend astray.
Penny: I don't know what succubus is, but it has "suck" in it, so that can't be good.

Leonard: I didn't tell Sheldon so we could have a few days alone.
Penny: Oh, that is so romantic.
Leonard: Uh, sure, that's why I did it.

Sheldon: Well, if it's any consolation, i'm sure Leonard's tormented every moment he's away from your warm embrace and cherry lips.
Penny: Thanks.
Sheldon: Oh, seriously?

Penny: You know what the worst part is?
Sheldon: That you're having to process your emotional pain without vodka?
Penny: No. Yeah....

Penny: I cannot believe we were missing that jerk.
Sheldon: You were.

Penny: I'm calling him.
Sheldon: Oh, goodie! Put him on speaker phone.

Raj: I haven't had a drink since last night.
Penny: You're talking to me.
Raj: I am. And, now I'm crying for a whole different reason.

Penny: I love you.
Leonard: I love you, too.

Penny: Oh gosh, Sheldon, the genius, is jealous of Leonard.
Sheldon: I'm not jealous. I'm just very unhappy that good things are happening for him and not happening for me.

Bernadette: You know, one of the things that helped me get through Howard being in space for so long was getting married before he left.
Penny: Bernadette, sweetie, shut up.

Penny: Oh, I don't know. Remember what happened when I took care of your goldfish?
Leonard: Well, flush Sheldon down the toilet and get me a new one.

TBBT Quotes

You can't ruin a friendship with sex that's like trying to ruin ice cream with chocolate sprinkles.

Raj

Sheldon: Even the dung beetle chooses to plot its course by using the Milky Way.
Raj: Is that true?
Sheldon: Everything I say is true. Now, of course, the dung beetle also enjoys eating fece, living in feces and making little balls out of feces. So, pick and choose which aspects of its lifestyle you want to embrace.