I honestly couldn't find a description for this character, but I guess the general gist for him is that he appears on"a little TV" commercial for when Beetlejuice is feeling depressed.  He advertises the latest product called Worm Your Way deoderant, which is said to attract the lonliness of worms in the Neitherworld.

As far as line deliveries go, I would like him to sound mellow for the first one to portray the sadness of the lonely worms.  However, for the second and third lines, I want him to have a more ecstatic and happy tone of voice when advertising the product.  The kind of voice doesn't really matter to me so long as he sounds like a salesman.  Again, video reference is in the description if needed.