Once you've had your food, you'd better make yourself scarce.
6 seconds sound clip from the The Remains of the Day movie soundboard.
You can hear this line at 01:43:07 in the Blu-ray version of the movie.
Quote context
[...]
- Well, I trust you'll have a most pleasant evening. Thank you.
- Is something special tonight, sir? Your visitors tonight, are they special?
- Can't tell you, my boy. Strictly confidential.
- So I can't sit in on it, then?
- Well, whatever it is that gonna take place tonight.
- Once you've had your food, you'd better make yourself scarce.
- Well, it sounds pretty special to me.
- Good evening, Prime Minister. How are you?
- Sorry, we've been rather delayed.
- Please wait here, Your Excellency. I'll inform His Lordship.
[...]