That's the dumbest thing I've ever seen.
4 seconds sound clip from the It's Christmastime Again, Charlie Brown movie soundboard.
You can hear this line at 00:07:13.041 in the Blu-ray version of the movie.
Quote context
[...]
- What was Handel's first name?
- I'm ashamed to admit, I don't know.
- Just ignore that Santa Claus. There's nothing he can do to you.
- I don't think you're a real Santa Claus. What do you have to say about that?
- I don't think you're the real Santa Claus. If you're the real Santa, where are your helpers?
- That's the dumbest thing I've ever seen.
- You mean 'giving.' Christmas is the joy of giving.
- I don't have the slightest idea what you're talking about.
- Giving. The only real joy is giving.
- I'm making out my Christmas list. Now, how do you spell your name?
- I'm your brother and you don't even know how to spell my name?
[...]