You incompetent, blithering nitwit!
5 seconds sound clip from the James and the Giant Peach (1996) movie soundboard.
You can hear this line at 00:46:25.764 in the Blu-ray version of the movie.
Quote context
[...]
- What about the shores of Tripoli?
- Did I say Tripoli? I meant the halls of Montezuma.
- Never have I heard such mendacity!
- Wait! If he says he's seen the world, then he's seen the world. Right, Mr. Centipede? Right?
- Well, I did used to live between two pages of a National Geographic.
- Very informative magazine, the National Geographic. Wonderful pictures.
- You incompetent, blithering nitwit!
- Did you see what he did to me?
- What do we do now? Which way do we go?
[...]