- You old fox, you.
- Fox?

2 seconds sound clip from the Holiday (1938) movie soundboard.

You can hear this line at 00:55:50.880 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, here you are.

- For the love of Pete, it's the witch and dopey.

- I've never been up here before. It's awfully quaint, isn't it?

- We like it.

- Linda, are you aware that there's another party going on in this house?

- You mean that low-class dance hall downstairs? Don't speak of it.

- Oh, excuse me, these are my friends. Professor and Mrs. Potter, Mr. and Mrs. Cram.

- How do you do?

- You old fox, you.

- Fox?

- Sam Hobson has been telling me about your little haul in Seaboard.

- You might have let us in the family in on it.

- Well, there's still time.

- Not the way that stock's acting.

- We've an order in our office to buy 60000 shares for Ross of Bay State Power all the way up to 30.

[...]