- Her father says she's a real wart.
- A what?
- A carbuncle, a blister, a festering pustule of malignant ooze.

7 seconds sound clip from the Matilda (1996) movie soundboard.

You can hear this line at 00:31:38.199 in the Blu-ray version of the movie.

Quote context

[...]

- Come in, come in, whoever you are.

- Almost got you.

- Good to see you, Jen. Good, good, good.

- Time for one of our little heart-to-hearts?

- Actually, it's about the new girl in my class, Miss Trunchbull... Matilda Wormwood.

- Her father says she's a real wart.

- A what?

- A carbuncle, a blister, a festering pustule of malignant ooze.

- Matilda Wormwood is a very sweet girl, and very bright.

- A bright child?

- Yes. She can multiply large sums in her head.

- So can a calculator.

- Well, I think she might be happier in an older and more advanced class.

- I knew it! You can't handle the little viper, so you're trying to foist her off on one of the other teachers!

- No, no, no, Miss Trunchbull.

[...]