How can I defeat this ravenous Bugblatter Beast of Traal

Hint 1 of 9:

As always, consult the HHGG, and DON'T PANIC!

Hint 2 of 9:

Did you bring the gun from the box in the Heart of Gold?

Hint 3 of 9:

It's not a very good gun, is it?

Hint 4 of 9:

Reveal you name to the beast (if you can still remember).