And the best way to annoy him is to feed his grandmother to the ravenous Bugblatter beast of Traal.
8 seconds sound clip from The Hitchhiker's Guide to the Galaxy (1981) - Episode 1 sitcom.
You can hear this line at 00:22:23.160 in the Blu-ray version of the TV Series.
Quote context
[...]
- Here is what to do if you want to get a lift from a Vogon... forget it.
- The best way to get a drink out of a Vogon is to stick your finger down his throat.
- And the best way to annoy him is to feed his grandmother to the ravenous Bugblatter beast of Traal.
- How did we get on board, then?
- The Dentrassi let us on board.
- I thought you said they were called Vogons.
- Vogons.
- No. Dentrassi are the in-flight caterers.
- Hey, hagra biscuit, the greatest!
- You'll love these guys. They cook the hoopiest frood food in the whole of the West Galaxy.
[...]