I know everything your dirty little mind is thinking. It shows.

6 seconds sound clip from the American Graffiti movie soundboard.

You can hear this line at 00:39:04 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, come on, honey. Look, so I never called you back. I've been, you know, busy.

- Yeah, three weeks?

- Besides, it only took me one night to realize if brains were dynamite, you couldn't blow your nose.

- Look who's talking.

- Hey, who's the wimp you're hanging out with now? Einstein?

- Tiger happens to be very intelligent, unlike you.

- I know everything your dirty little mind is thinking. It shows.

- Hey, now, buddy, look. The lady obviously doesn't wanna have to...

- Look, creep. You want a knuckle sandwich?

- No, thanks. I'm waiting for a double Chubby Chuck.

- Then keep your smart-ass mouth shut.

- Hey, I'll call you sometime, Deb. Some night when I'm hard up.

[...]