When are you gonna get it through your thick skull, Lorraine? You're my girl.
4 seconds sound clip from the Back to the Future Part II movie soundboard.
You can hear this line at 01:07:02.469 in the Blu-ray version of the movie.
Quote context
[...]
- That's about as funny as a screen door on a battleship.
- Screen door on a submarine, you dork.
- Look, Biff, somebody already asked me to the dance.
- I'm going with Calvin Klein, okay?
- Calvin Klein? No, it's not okay. You're going with me, understand?
- When are you gonna get it through your thick skull, Lorraine? You're my girl.
- I wouldn't be your girl even if you had a million dollars!
- Yes, you will! It's you and me, Lorraine. Watch it! It's meant to be.
- I'm going to marry you someday, Lorraine. Someday you'll be my wife!
- You always did have a way with women.
[...]