who can tell me what show this was?

So I would watch horror shows on t.v. as a kid and I remember watching a particular show but I don't know what it was called or what the specific story was called so I'm hoping someone can help me out.

Here it is to the best of my memory.

Someone is invited to dinner at a weird couple's house. They have something big to eat like a turkey or something. The guest ravenously devours his meal but the couple only pick at theirs and they show annoyance towards the guy finishing his plate of food. The couple takes their plates to the kitchen and the man still at the table peeks at them dropping their leftover food down a shaft with a door. All I can remember after that is the guests' curiosity gets the best of him and he opens the shaft to look inside, and if i remember rights what he sees to his horror is a long slimy tube of teeth kinda like the thing in star wars, and before he can react the couple pushes him down the shaft to his demise and digestion.

if anyone has a clue what this is I would appreciate the help :)

[Bella Corday]

Sounds like Tales from the Darkside episode A New Lease on Life.