- I don't think you know what you're talking about.
- I do know what I'm talking about, all right? Listen to me.

4 seconds sound clip from the Boogie Nights (1997) movie soundboard.

You can hear this line at 00:32:06.767 in the Blu-ray version of the movie.

Quote context

[...]

- You're no bigger than a minute, are you?

- Uh-uh. Ha, ha.

- Shy as a butterfly.

- I'll bet.

- He has every right to tell me how to sell stereos. It's his store, I'll listen. He does not have the right to tell me how to dress. Where's he get off telling me how to dress, huh?

- It's old. It's just plain old.

- First of all, he was obviously pissed off about the music.

- What's wrong with it, you know?

- The cowboy look ended about six years ago.

- It's coming back though, Becky.

- No, it's not. It's over. It's dead, okay?

- I don't think you know what you're talking about.

- I do know what I'm talking about, all right? Listen to me.

- It sounds like your bosses at the stereo store are saying the same thing.

- What? What?

- You have to get a new look.

- What? You get a new look!

- I have a look, okay? The look I have is just fine.

- What's your look?

- Chocolate love, all right?

- One hundred percent. You don't have to lash out like that, Buck. I'm just trying to be your friend.

- Okay, Becky. Drop it.

[...]