My friend told me about an episode from a television show that he remembers from years ago. He doesn't remember the name of the television show but in the episode that he told me about, there is a grandpa and smalll children. The grandpa tells them about a monster that if his name is spoken too many times, the monster will grow bigger and it will come closer to the house. Does this sound familiar to anyone.

Think your friend might be looking for an episode of Tales from the Darkside called Seasons of Belief.
Here's a snippet that is pretty close to your description:
[I]... At first the kids think that both Mom and Pop are full of hot air, on this cold and snowy Christmas Eve, about this so-called flying monster who's ears get bigger and bigger, turning into wings, every time its name is mentioned. But as the midnight hour approaches they seem to feel that there's something to this monster story as it becomes apparent that the monster is a real not a made up creature.....
Here's the entire show:
Tales From the Darkside - Seasons of Belief on Vimeo