I'm sorry, sis.
3 seconds sound clip from the Dark Command (1940) movie soundboard.
You can hear this line at 00:08:21 in the Blu-ray version of the movie.
Quote context
[...]
- But be sure and keep this space clear for brawling purposes.
- You both act like you're in a saloon, so I just thought I'd make you feel at home, dad.
- Well, go on, apologize to your sister for making a deplorable scene.
- All right, Ellie, you may go.
- But don't forget the sawdust, just in case.
- Now what's all this yelling about a gun, anyway?
- Now listen, sis. I'm old enough...
[...]