Yeah, waiting for your big sister.
4 seconds sound clip from the The Roaring Twenties (1939) movie soundboard.
You can hear this line at 00:19:13 in the DVD version of the movie.
Quote context
[...]
- Hey, Ma, I got an A in algebra!
- Hello.
- Hello.
- Hello.
- Well, are you waiting for somebody?
- Yeah, waiting for your big sister.
- My big sister? Why, I haven't got any big sister.
- Wait a minute. Don't tell me you're Eddie?
- Oh, I wondered if I was ever gonna get to see you.
[...]