Well, that's a long story, Judge.
5 seconds sound clip from the The Westerner (1940) movie soundboard.
You can hear this line at 00:15:00 in the DVD version of the movie.
Quote context
[...]
- She's the most beautiful woman I ever met.
- Met? You mean to tell me you met Lily Langtry, the real her, in the flesh?
- Well, that's a long story, Judge.
- Bart, you and Blackjack get yourself a drink, huh?
- Mighty fine liquor. What do you call it?
- Go on.
- Did you get to know her real well?
[...]