I suppose you blue-faced baboons have some explanation for this outrage.
5 seconds sound clip from the Chitty Chitty Bang Bang (1968) movie soundboard.
You can hear this line at 01:19:14 in the Blu-ray version of the movie.
Quote context
[...]
- What do you think you're doing?
- You nincompoops! I'll have you sent away for the rest of your natural lives.
- I suppose you blue-faced baboons have some explanation for this outrage.
[...]