I don't know what you're talking about. Nobody's told us anything.
6 seconds sound clip from the Bon Voyage, Charlie Brown movie soundboard.
You can hear this line at 00:47:26 in the Blu-ray version of the movie.
Quote context
[...]
- That's why you get all those Cs and Ds, sir.
- Hey, Chuck, where's your tablier and backpack?
- My what?
- Are you going to embarrass us on our first day at school?
- I don't know what you're talking about. Nobody's told us anything.
- All I know is that we had a terrible time. Nobody was there to meet us.
- Le chateaux de le Mal Voisin? C'est impossible! Nobody go to the chateau of the bad neighbor.
- The baron is a recluse and hates everybody. He do not allow visitors.
[...]