Bernadette: How do I put this? She's been known to call you a name that usually applies to a lady part. Or a cat, or a willow.
Leonard: I can't believe she would say that about me.
Bernadette: If you're gonna cry about it there's tissues in my purse. Unless you got some in yours, big willow.

Bernadette: She's just being nice.
Howard: Well, I'm her son, how come she doesn't send someone to check on me if I'm lonely.
Bernadette: Because you have a wife!
Howard: Yeah, well, sometimes you work late.

Howard: My arm is feeling numb. *Howard rubs his right arm*
Bernadette: That's the wrong arm for a heart-attack, doofus.
*Howard switches to his left arm*

Bernadette: You better find my husband's mother, 'cause one way or another we're walking out of this airport with a dead woman.

Amy: As my mom used to say, "When you're doing a puzzle, it's like you've got a thousand friends." She was full of fun lies like that.

Penny: Run to India.

Sheldon: My brain is better than everybody's!