Then why'd you say that, chief? Come on man, don't let your mouth write a check your butt can't cash.

7 seconds sound clip from the Dazed and Confused (1993) movie soundboard.

You can hear this line at 01:10:25 in the Blu-ray version of the movie.

Quote context

[...]

- No, I may have said something about smelling some pot.

- You know, it was just an observation.

- Oh, an observation, huh? Well, who the hell are you, man? Isaac fuckin' Newton?

- Well, guess what, genius. I'm the one smoking marijuana, motherfucker. You got a problem with that?

- No. Of course not.

- Then why'd you say that, chief? Come on man, don't let your mouth write a check your butt can't cash.

- So I'm blazin' with my friends. So I'm a fuckin' pothead, man. What's it to you? Huh?

- What's the matter, pussy? Out of observations? Why don't you observe while I punch your teeth down your fuckin' throat!

- Come on, dude, relax! Relax! He's cool, man. Relax.

- Hey, I'll be watching you, Newton.

[...]