You're a low-down, cowardly, nasty thing, you!
5 seconds sound clip from the Gone with the Wind (1939) movie soundboard.
You can hear this line at 01:30:30 in the Blu-ray version of the movie.
Quote context
[...]
- Never mind about loving me. You're a woman sending a soldier to his death with a beautiful memory.
- Scarlett, kiss me. Kiss me once.
- You're a low-down, cowardly, nasty thing, you!
- They were right. Everybody was right. You... You aren't a gentleman.
- A minor point at such a moment.
- Here. If anyone lays a hand on that nag, shoot him. But don't make a mistake and shoot the nag.
[...]