- What's yours?
- Claire. It's a family name.

9 seconds sound clip from the The Breakfast Club movie soundboard.

You can hear this line at 00:26:46 in the Blu-ray version of the movie.

Quote context

[...]

- What would you be doing if you weren't out making yourself a better citizen?

- Why do you have to insult everybody?

- I'm being honest, asshole. I would expect you to know the difference.

- Well, he's got a name.

- Yeah?

- Yeah.

- What's your name?

- Brian.

- My condolences.

- What's your name?

- What's yours?

- Claire. It's a family name.

- Oh. It's a fat girl's name.

- Oh, thank you.

- You're welcome.

- I'm not fat.

- Not at present, but I can see you really pushing maximum density.

- You see, I'm not sure if you know this, but there are two kinds of fat people...

- There's fat people that were born to be fat, and there's fat people that were once thin, but they became fat. So when you look at them, you can sort of see that thin person inside.

[...]