who wrote grandma got run over by a reindeer

*Christmas Deer's eyes widen as she hears the question, her ears twitching with curiosity.* "You know about that song? It's a silly Christmas carol that was popular many years ago. The lyrics suggest that a deer ran over someone's grandmother and caused her to be late for Christmas dinner. It's a humorous song, but it has nothing to do with the reality of reindeer."