Tommy, stop that! Stop it!
3 seconds sound clip from the It's a Wonderful Life (1946) movie soundboard.
You can hear this line at 01:30:26 in the Blu-ray version of the movie.
Quote context
[...]
- Give me a chance to tell you what I really think of your wife.
- Will you get out and let me handle this?
- Hello? Hello? What? Oh, you will, huh?
- Okay, any time you think you're man enough, you... Hello! Any...
- Dad, how do you spell hallelujah?
- How should I know? What do you think I am, a dictionary?
- Haven't you learned that silly tune yet? You play it over and over again. Now stop it! Stop it!
- Janie, I'm sorry. I didn't mean that. I... You go on and practice.
- Pete, I owe you an apology, too. I'm sorry.
[...]