Ew! Dog food.
4 seconds sound clip from the Is This Goodbye, Charlie Brown? (1983) movie soundboard.
You can hear this line at 00:08:51.896 in the DVD version of the movie.
Quote context
[...]
- Mr. Caterer, serve the dinner.
- I propose a farewell toast to Lucy and Linus. Good luck and happiness in your new home.
- Hey, I'm not sure, but are these dog biscuits?
- What kind of a lunch is this?
- It must be a fancy continental lunch, sir. I see there's a gravy boat. It seems to be water, sir.
- Well, I sure hate to say goodbye, Charlie Brown. It's sure been nice knowing you.
- This is really happening. I can't believe it.
- Well, so long, you old blockhead. It's been nice knowing you.
- I don't know what to say. I can't believe it. I, I...
[...]