But you're right about Jack Fitzsimmons, he's an absolute rat.
6 seconds sound clip from the Breakfast at Tiffany's movie soundboard.
You can hear this line at 00:40:50 in the Blu-ray version of the movie.
Quote context
[...]
- 'Mr Fitzsimmons, powder room, $50.'
- 'Repair one black satin dress.'
- Sally, darling, please stop. You're making me blush.
- But you're right about Jack Fitzsimmons, he's an absolute rat.
- I guess, of course, I don't really know anybody but rats. Except, of course, Fred here.
- You do think Fred is nice, don't you?
- Goodbye, Uncle Sally. Till next week.
[...]