Ah, let them punch their heads off. I give it up. I don't care anymore.

4 seconds sound clip from the Criss Cross (1949) movie soundboard.

You can hear this line at 00:06:09.844 in the DVD version of the movie.

Quote context

[...]

- Not me, I never butt in. These days, it don't pay.

- You can't have people brawling around, gives the place a bad name. Pretty soon, nobody'll want to come in.

- You'll come in. You're my best customer, morning till night.

- She sits on that stool so much, that frankly someday I think she's gonna get stuck to it.

- Hey, I thought Mr. Thompson was a friend of yours.

- Ah, let them punch their heads off. I give it up. I don't care anymore.

- You always wanted to get Slim Dundee. Now is your chance.

- What do you mean?

- He's got a knife on him. I didn't say nothin'. Now remember that.

- Just a friendly argument, Lieutenant. Just scufflin' around.

- This is too good to be true, Slim.

[...]