Buck, it's your brother.
4 seconds sound clip from the Uncle Buck (1989) movie soundboard.
You can hear this line at 00:09:49 in the Blu-ray version of the movie.
Quote context
[...]
- I don't think we have much choice.
- Yeah?
- Bobby. Bobby, hang on a minute.
- Bobby, I just used your Christmas present.
- Bobby, you little piss ant, how you doing?
[...]