It was a comedy on in the evening on a regular tv (not cable or dish). The show was about a family, probably disfunctional. I think with real actors, but it may have been animated. There was a relative who lived at a 24 hour all you can eat buffet. I don't think they ever showed the relative, just talked about him/her. The relative went to the buffet one day and never returned home, just stayed there foever. The relative may be the grandfather, but I don't know for sure. Does anyone know what show I'm talking about?